'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."
Sunan Ibn Majah Book 1, Hadith 319
← Previous Hadith "When the Messenger of Allah wanted to sleep and he was sexually impure, he would perform ablution as for prayer."

Sunan Ibn Majah Book 1, Hadith 318 Next Hadith → 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.

Sunan Ibn Majah Book 1, Hadith 320