AI-Hakam narrated to us who heard from Ibrahim narrating that.
Sahih Muslim Book 3, Hadith 23
← Previous 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 Next Hadith → Umar said: Is one amongst us permitted to sleep in a state of impurity (i. e. after having sexual intercourse)? He (the Holy Prophet) said: Yes, after performing ablution.

Sahih Muslim Book 3, Hadith 24