Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: Sayyiduna Umar (may Allah be pleased with him) mentioned before the Prophet (peace and blessings be upon him) that he becomes in a state of janabah during the night, so the Prophet (peace and blessings be upon him) instructed him to perform wudu, wash his private parts, and then go to sleep.