Hadith 584
´It was narrated that 'Aishah said:` "When the Messenger of Allah wanted to sleep and he was sexually impure, he would perform ablution as for prayer."
Hadith 585
´It was narrated from Ibn 'Umar that :` 'Umar bin Khattab said to the Messenger of Allah: "can anyone of us sleep if he is sexually impure?" He said: "Yes, if he performs ablution."
Hadith 586
´It was narrated from Abu Sa'eed Khudri that:` He used to become sexually impure at night, then he would want to sleep. The Messenger of Allah told him to perform ablution and then go to sleep.