{"...And let those who oppose the Messenger's commandment beware lest some trial befall them or a painful torment be inflicted upon them."}
[Qur'an an-Nur 24; 63]
Examples:
1 - Ibn 'Abbas reported that the Messenger of Allah said:
"Do not enter upon your women when returning from a journey at night."
He then narrated that the Messenger of Allah returned once with a caravan at night, whereupon two men with him slipped away and secretly went to their families, even though they had heard the Prophet forbidding them from doing so. Subsequently, both of them found a man with his wife.
['Sunan ad-Darimi'; # 444, and it is authentic]
2 - Salamah bin al-Akwa' reported:
"A man ate with the Messenger of Allah using his left hand. The Prophet said to him: "Eat with your right hand." The man arrogantly said: "I am unable to do so." The Prophet then said: "May you never be able to do so." The man was never again able to raise his right hand to his mouth."
['Sahih Muslim'; # 2021]
3 - Abu Yahya as-Sagi narrated:
"We were walking through the alleyways of Basrah to the door of some scholars of Hadith. So, I quickened my strides and a man from amongst the people of Basrah came to us and sarcasitically said: "Raise your feet well above the wings of the Angels and do not break them (a mocking reference to the hadith "...the Angels lower their wings for the seeker of knowledge...")." His feet then became stiff and he fell right where he was standing."
['Bustan al-'Arifin' by an-Nawawi; p. 92]
4 - Muhammad bin Isma'il at-Taymi said:
"I read in some narrations that, upon hearing the words of the Prophet: "If one of you awaken from sleep, then he should not dip his hand in a container unless he washes his hand because he does not know where it was while he was sleeping," an innovator said: "I know where my hands went while in bed, so I do not have to fulfill this command!" Consequently, upon waking up the next morning, his hand - up to the forearm - was found inserted into his anus."
['Bustan al-'Arifin' by an-Nawawi; p. 94]
5 - Ibn Kathir narrated, on the authority of Ibn Khalkan:
"It has reached us from a trustworthy group of people who travelled from Basrah to Damascus that they were in a village called Dir Abi Salamah, and in it, there was a man from the bedouins who would mock others excessively and was quite ignorant.
One day, the siwak and its virtues were mentioned in his presence, so, he said: "By Allah, I do not use the siwak except to clean my back passage." So, he took a stick of siwak and stuck it in his rectum in mockery. He was in great pain that night, and for the next nine months, he would complain of a great pain in his stomach and rectum. Then, he experienced labor pains just as a pregnant woman would suffer, and suddenly, a creature with the body of a giant rat, the head of a fish, four paws, and a tail the length of a human hand whose end looked like that of a rabbit's came out of the man's body. When the creature came out, it woke up and screamed three times, so, the man's daughter got up and smashed its head open, killing it. The man himself only lived two days more, saying on his deathbed: "This creature has killed me! It cut my intestines apart!" This event was witnessed by a large group of people from this village, including the village khatib."
['al-Bidayah wan-Nihayah'; 13/263]
6 - Anas bin Malik narrated:
"The Messenger of Allah sent a man from his Companions to a man from the people of disbelief in order to call him to Allah - the Blessed and Exalted - so, he said to the Companion:
"What is this Lord of yours that you call me to? Is He made of iron? Is He made of copper? Is He made of silver? Is He made of gold?"
So, the Companion returned to the Prophet and told him of what had happened, so, he sent the Companion back a second time. The man told him the same thing, so, he was sent a third time. The man told him the same thing, so the Companion returned and informed the Prophet, so, Allah - the Blessed and Exalted - sent a lightining bolt that struck the man and burned him up.
The Messenger of Allah then said: "Verily, Allah - the Blessed and Exalted - has sent upon this man that you know a lightning bolt which has burned him up."
The verse was then revealed: {"... He sends lightning bolts, and therewith He strikes whom He Wills, yet they dispute about Allah, and He is mighty in strength and severe in punishment."} [ar-Ra'd; 13]"
[Reported by al-Bayhaqi in 'as-Sunan al-Kubra' (11259), al-Haythami in 'Majma' az-Zawa'id' (7/24), and it is authentic]
7 - Ibn al-Jawzi reported, on the authority of 'Abd al-Majid bin 'Abd al-'Aziz:
"In Khurasan, there was a man with us who used to make copies of the Mushaf in three days. One day, a man came to him and asked: "How long did it take you to write this?" So, the man held up his thumb, index, and middle fingers, saying: "In three days, {"...and nothing of fatigue touched Us."} [Qaf; 38]"
So, these three fingers of his suddenly became stiff, and he was never able to use them again."
['Sayd al-Khatir'; p. 398]
8 - adh-Dhahabi reported:
"Muhammad bin 'Abd al-Malik az-Zayyat ordered that a long piece of wood be brought, pierced with many iron nails. He would torture his prisoners with this wood - among which was Ahmad bin Hambal - saying: "I have never had mercy upon anyone, as mercy is something that weakens the soul."
Later on, when he was imprisoned in the same jail, he was tortured using the same device. When he would scream for mercy, it was said to him: "Mercy is something that weakens the soul."
['Siyar A'lam an-Nubala''; 11/172]
9 - al-Hafidh Abu Sa'id as-Sam'ani reported, on the authority of al-Qadi Abu at-Tayyib:
"We were sitting in a gathering in the mosque of al-Mansur, and a young man from Khurasan came to us, asking about the ruling on a particular issue. We gave him an answer, using a hadith narrated by Abu Hurayrah as proof. He replied: "I do not accept the hadith of Abu Hurayrah." He didn't even finish his sentence, when a large snake fell from the ceiling of the mosque, with the people dispersing from its path as it began to chase the youth. The people told him to repent, and as soon as he said: "I repent," the snake disappeared, leaving no trace of its existence."
['Siyar A'lam an-Nubala'' (2/618), and Ibn Taymiyyah reports a similar incident in 'Majmu' al-Fatawa' (4/538), except that the snake kills the youth in his version]
10 - adh-Dhahabi reported:
"A man came to Ibn Sirin and said: "I had a dream in which I had a glass filled with water in my hand. Suddenly, the glass shattered, with the water remaining as it was."
Ibn Sirin said to him: "Fear Allah! Verily, you had no such dream. I will not be taken to account for your lying, but, this dream would indicate that your wife will die, and her child will survive."
When the man left, he said: "By Allah, he is right. I had no such dream."
When he arrived home, he found that his pregnant wife was dead, and her newborn child had survived."
['Siyar A'lam an-Nubala''; 4/617]
11 - Ibn al-Qayyim narrated:
"...and it is reported that in Egypt, there was a man who would maintain the mosques, making the call to prayer, etc. He was, by all outward means, an obedient person and devout worshipper.
One day, as he usually would, he ascended the minaret to make the call to prayer. At the base of the minaret, there was a Christian woman standing. He saw her, and was seduced by her looks. So, he descended the minaret, went to her, and entered her home. She said to him: "Who are you, and what do you want?"
He replied: "I want you."
She said: "Why?"
He said: "You have enslaved my eyes, and you have captured my heart."
She said: "I will never answer your desire in a doubtful or suspicious manner."
He said: "OK, so, I will marry you, then."
She said: "You are a Muslim, and I am a Christian. My father will never allow me to marry you."
He said: "So, I will become a Christian."
She said: "If you wish to do so, go ahead."
So, the man became a Christian in order to marry this woman, and lived with the woman's family in her house. Later on that day, however, he was on the roof of the house. He fell from the roof and died without even having enjoyed his new bride. So, he lost the woman, and he lost his religion."
['ad-Da' wad-Dawa''; p. 127]
12 - Ibn Kathir narrated, on the authority of Ibn al-Jawzi:
"There was an unfortunate man from the Mujahidin who were fighting in the lands of the Romans. So, when the Muslims were in one of their expeditions and surrounding a land of the lands of the Romans, he looked to a woman of the Romans who was sitting in a fortress therein, and he became attracted to her and sent her a message asking how he could reach her. She replied: "As soon as you conquer this area, then come up to the fortress and you can have me," so, as soon as the area was conquered by the Muslims, he did this.
From that point on, there was not a single skirmish that the Muslims would be engaged in except that he would be up in the fortress with her. This caused the Muslims great sadness and distress, and it became very hard on them to deal with this reality. After a while, they went up to the fortress where he was staying with this woman and said to him: "What happened to all the Qur'an you knew? What happened to your knowledge? What happened to your fasting? What happened to your Jihad? What happened to your prayer?"
So, he replied to them: "Know that I have forgotten all of the Qur'an I used to know except for these verses: {"Those who disbelieve wish that they were Muslims. Leave them to eat and enjoy, and let them be preoccupied with false hope. They will come to know!"} [al-Hijr; 2-3] and I now have wealth and children with them.""
['al-Bidayah wan-Nihayah'; 11/68]
13 - Sa'id bin al-Musayyib narrated:
"My grandfather said: "I came to the Prophet, so, he said to me: "What is your name?" I said: "Huzn (sadness)." He said: "Your name is now Sahl (ease)." I said: "I will not change a name that my father gave me."""
Sa'id bin al-Musayyib commented: "So, this sadness has remained in our lineage ever since."
['Sahih al-Bukhari'; # 6190]
Ibn Hajar mentions:
Ibn at-Tin said: "What Ibn al-Musayyib meant when he said "...this sadness has remained in our lineage ever since," is the absence of an ease in acquiring anything they want. "
ad-Dawudi said: "He meant that they always have some type of harshness in their mannerisms, except that Sa'id's harshness was directed into anger for the Sake of Allah."
Others have said: "This is an indication of the harshness that has remained in the character of his descendents, as the experts in lineage have mentioned that the character of all of his descendents are well-known for bad manners that have not left them until now."
['Fath al-Bari'; 10/590]
14 - Sufyan ath-Thawri said:
"I was granted the understanding of the entire Qur'an. When I accepted a gift from the ruler, this understanding was taken away from me."
[Reported by Bakr Abu Zayd in 'Hilyat Talib al-'Ilm'; p. 7]
15 - Ibn al-Jazwi reported, on the authority of 'Abd al-Hamid:
"I saw a man who would constantly have intercourse with his wife while she was menstruating. So, he himself eventually began menstruating. When he finally repented, the menstruating stopped."
['Sayd al-Khatir'; p. 398]