Whenever the Prophet (ﷺ) lay down for sleep at night, he would place his (right) hand under his (right) cheek and supplicate: "Allahumma bismika amutu wa ahya [O Allah, with Your Name will I die and live (wake up)]." And when he woke up, he would supplicate: "Al-hamdu lillahil-ladhi ahyana ba'da ma amatana, wa ilaihin-nushur (All praise is due to Allah, Who has brought us back to life after He has caused us to die, and to Him is the return)."[Al-Bukhari].

After the Fajr (dawn) prayer the Prophet (ﷺ) used to sit crossed legged in the same place in which he had prayed till the sun shone brightly.[Abu Dawud].

I saw Messenger of Allah (ﷺ) sitting in the compound of the Holy Ka'bah, with the thighs against the stomach and arms around his legs.[Al- Bukhari].

Whenever we came to the gathering of the Prophet, we would sit down at the end (of the assembly).[Abu Dawud and At-Tirmidhi].

The Prophet (ﷺ) said, "Whenever a group of people sit in a gathering in which they do not remember Allah the Exalted, nor supplicate to elevate the rank of their Prophet, such a gathering will be a cause of grief to them. If Allah wills, He will punish them, and if He wills He will forgive them."[At-Tirmidhi].

Messenger of Allah (ﷺ) said, "When one of you sees a bad dream let him blow three times on his left, seek refuge in Allah from the Satan three times (i.e., by saying: A'udhu billahi minash-Shaitanir-Rajim) and change the side on which he was lying."[Muslim].

Messenger of Allah (ﷺ) directed me thus: "Whenever you go to bed, perform Wudu' as you do for Salat then (before sleeping) recite: 'O Allah! I have submitted myself to You, I have turned myself to You, committed my affairs to You and sought Your refuge for protection out of desire for You and fear of You (expecting Your reward and fearing Your punishment). There is no refuge and no place of safety from You but with You. I believe in the Book You have revealed and in the Prophet (ﷺ) You have sent."' Messenger of Allah (ﷺ) added: "If anyone recites these words and dies during the night, he will die on the true Deen, and if he remains alive till the morning, he will obtain good. And make this supplication your last words (before sleeping)."[Al-Bukhari and Muslim].

[Al-Bukhari and Muslim].

And in a version narrated by Abu Dawud "He should not sit between two men without their permission."

My father said: I was lying down on my belly in the mosque when someone shook me with his foot and said, "Lying down this way is disapproved by Allah." I looked up and saw that it was Messenger of Allah (ﷺ).[Abu Dawud].

I saw the Prophet (ﷺ) seated with his arms enfolding his legs; and when I saw him in such a state of humble guise I trembled with fear due to the awe (he showed in that posture).[Abu Dawud and At-Tirmidhi].

Messenger of Allah (ﷺ) passed by me when I was sitting with my left hand behind my back and leaning on my palm. On seeing me in this posture he said, "Do you sit like those upon whom the Wrath of Allah has descended?"[Abu Dawud].

[Al-Bukhari and Muslim].

I heard Messenger of Allah (ﷺ) saying "The best assemblies are those in which people make room for one another."[Abu Dawud].

[Abu Dawud and Al-Hakim].

The Prophet (ﷺ) said, "When the time draws near (i.e., near the end of the world), the dream of a believer can hardly be false; and the dream of a believer represents one part from forty-six parts of Prophethood."[Al-Bukhari and Muslim].One narration says: Messenger of Allah (ﷺ) said, "The most truthful of you in their speech are those who see the truest visions."

Messenger of Allah (ﷺ) said, "He who sees me in his dream will see me in his wakefulness (or he (ﷺ) may have said it is as though he has seen me in a state of wakefulness), for Satan does not appear in my form."[Al-Bukhari and Muslim ].

I heard the Prophet (ﷺ) saying, "When one of you sees a dream that he likes, then it is from Allah. He should praise Allah for it and relate it to (others)."Another narration adds: Messenger of Allah(ﷺ) said, "He should not report it except to those whom he loves. And if he sees one which he dislikes, then it is from the Satan. He should seek refuge in Allah against its evil and should not mention it to anyone. Then it will not harm him."[Al- Bukhari and Muslim].

The Prophet (ﷺ) said, "A good vision (dream) is from Allah and a bad dream is from the Satan. He who sees something in a dream that he dislikes, should blow thrice on his left, must seek Allah's Refuge from the evil of the Satan (i.e., by saying: A'udhu billahi minash-Shaitanir-Rajim). Then it will not harm him."[Al-Bukhari and Muslim].