Narrated Qatada:

Anas bin Malik said, "The Prophet (S) used to visit all his wives in a round, during the day and night and they were eleven in number." I asked Anas, "Had the Prophet (S) the strength for it?" Anas replied, "We used to say that the Prophet (S) was given the strength of thirty (men)." And Sa`eed said on the authority of Qatada that Anas had told him about nine wives only (not eleven).
 

Reference : Sahih al-Bukhari 268

In-book reference : Book 5, Hadith 21

'A'isha the wife of the Messenger of Allah (s.a.w.a.) reported. A person asked the Messenger of Allah (s.a.w.a.) about one who has sexual intercourse with his wife and parts away (without orgasm) whether bathing is obligatory for him. 'A'isha was sitting by him. The Messenger of Allah (s.a.w.a.) said:

I and she do it and then take a bath.