It is narrated from Sayyiduna Bara’ (may Allah be pleased with him) that when the Prophet (peace and blessings of Allah be upon him) intended to sleep, he would place his hand under his right cheek and recite: «اللَّهُمَّ قِنِي ......» ‏‏‏‏“O Allah! Save me from the punishment on the Day when You will resurrect Your servants.”
In another narration from Sayyiduna Bara’ (may Allah be pleased with him), it is reported in a similar manner.

It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Prophet (peace and blessings of Allah be upon him) said: "Whoever among the Muslims adheres to two things will certainly enter Paradise. Both are easy, but those who act upon them are few." It was asked: O Messenger of Allah! What are they? He (peace and blessings of Allah be upon him) said: "After every prayer, one of you should say Allahu Akbar ten times, Alhamdulillah ten times, and SubhanAllah ten times. This makes one hundred and fifty on the tongue and one thousand five hundred on the scale." I saw that the Prophet (peace and blessings of Allah be upon him) was counting them on his fingers, "and when he goes to his bed, he should say (thirty-three times) SubhanAllah, (thirty-three times) Alhamdulillah, and (thirty-four times) Allahu Akbar, so this will be one hundred on the tongue and one thousand on the scale. Who among you commits twenty-five hundred sins in a day and night?" It was asked: O Messenger of Allah! How can a person not act upon them? He (peace and blessings of Allah be upon him) said: "Satan comes to one of you during his prayer and reminds him of other tasks, so he forgets these tasbihat."

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "When any one of you goes to bed, he should take the edge of the inner part of his lower garment and dust off the bed with it, and say 'Bismillah' (In the name of Allah), for he does not know what may have come onto the bed after him. Then, when he intends to lie down, he should lie on his right side and recite this supplication: 'O my Lord! You are pure, in Your name I have laid down my side, and by Your help I will rise. If You take my soul, then forgive it, and if You release it, then protect it as You protect Your righteous servants.'"

It is narrated from Sayyiduna Rabi’ah bin Ka’b (may Allah be pleased with him) that I used to spend the night at the door of the house of the Prophet (peace and blessings of Allah be upon him) so that I could provide him with water, etc., for ablution. I would hear the Prophet (peace and blessings of Allah be upon him) saying“Sami’ Allahu liman hamidah”late into the night, and I would hear him reciting“Alhamdu lillahi Rabbil ‘alamin”for a long time.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings of Allah be upon him) said: "Whoever sleeps while there is grease on his hand and he does not wash it off, then if something bites him, he should blame only himself."

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "Whoever sleeps at night with greasy hands and then something bites him, he should blame only himself."

It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said:“(At night) close the doors, tie the mouths of the water-skins, turn the vessels upside down or cover the vessels, and extinguish the lamps, because the devil does not open a closed (door), nor untie a knot, nor uncover a covered vessel. And indeed, the mouse is mischievous; it burns people's houses.”

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them) that he said: A mouse came and started pulling the wick of the lamp. A girl went to stop it, but the Prophet (peace and blessings of Allah be upon him) said: "Leave it." So the mouse brought the wick and placed it on the mat on which the Prophet (peace and blessings of Allah be upon him) was sitting. A spot the size of a dirham was burnt on that mat. Then the Messenger of Allah (peace and blessings of Allah be upon him) said: "When you go to sleep, extinguish your lamps, for Satan inspires such things, and they burn you."

It is narrated from Sayyiduna Abu Sa'id (may Allah be pleased with him), he said: One night the Prophet (peace and blessings of Allah be upon him) woke up, and he suddenly saw a mouse taking a lamp and climbing onto the roof in order to set the house on fire. Then the Prophet (peace and blessings of Allah be upon him) cursed it and declared its killing permissible even during the sacred months.

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings of Allah be upon him) said: "Do not leave fire burning in your houses when you go to sleep."