Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: When any one of you wakes up from sleep, he should not put his hand into (the ablution) water until he has washed it three times, for he does not know where his hand spent the night.

This narration is from Ibn Maqri’, and he has mentioned the word «حيث» once in place of «اين» .

Abdullah bin Abbas (may Allah be pleased with them both) narrates that one night I stayed with my maternal aunt, Lady Maymunah (may Allah be pleased with her). I saw that the Messenger of Allah (peace and blessings be upon him) got up at night and performed a light ablution from a water-skin. He described the ablution of the Prophet (peace and blessings be upon him) as very light and brief. Abdullah bin Abbas (may Allah be pleased with them both) says: I also performed ablution in the same way and stood on his left side. The Prophet (peace and blessings be upon him) turned me and made me stand on his right side. Then, as much as Allah willed, the Prophet (peace and blessings be upon him) prayed, then slept until he began to snore. Then the caller to prayer came to him, so he stood up for prayer without performing ablution again.

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates that one night I stayed with my maternal aunt, Sayyida Maymunah bint al-Harith (may Allah be pleased with her). (I saw that) the Noble Prophet (peace and blessings be upon him) got up at night and performed prayer, then lay down and slept until he began to snore. Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says: Then Sayyiduna Bilal (may Allah be pleased with him) came and informed him about the prayer. The Prophet (peace and blessings be upon him) got up and performed the prayer, but did not perform ablution.

Sayyiduna Abu Huraira (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: My eyes sleep but my heart does not sleep.