Whenever the Messenger of Allah (ﷺ) intended to sleep after having sexual intercourse, he performed ablution as for the prayer before going to sleep.
Sahih Muslim Book 3, Hadith 21
← Previous Hadith The Apostle (ﷺ) woke up at night; relieved himself, and then washed his face and hands and then again slept.

Sahih Muslim Book 3, Hadith 20 Next Hadith → Whenever the Messenger of Allah (ﷺ) had sexual intercourse and intended to eat or sleep, he performed the ablution of prayer.

Sahih Muslim Book 3, Hadith 22