It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them) that Sayyiduna Umar (may Allah be pleased with him) mentioned to the Messenger of Allah (peace and blessings be upon him) that he needs to bathe at night. So the Messenger of Allah (peace and blessings be upon him) said: Perform ablution and wash your private part, then sleep.

It is narrated from Sayyida Aisha (may Allah be pleased with her) that she said: When any of you has intercourse with his wife and then wishes to sleep before performing ghusl, he should not sleep until he performs wudu as is done for prayer.

Hazrat Nafi reports that Sayyiduna Abdullah bin Umar (may Allah be pleased with them both), when he intended to sleep or eat in a state of janabah, would wash his mouth, wash both hands up to the elbows, and wipe over his head, then he would eat food or go to sleep.