Sahih Muslim Book 3, Hadith Number 599.

Chapter : It is permissible for a person to sleep after sexual intercourse (without a bath) and the desirability of ablution for him, and washing of the sexual organ, as he intends to eat, drink, or sleep or cohabit.

This Hadith has been transmitted by Shu’ba with the same chain of transmitters. Ibn at-Muthanna said in his narration: AI-Hakam narrated to us who heard from Ibrahim narrating that.