Narrated Anas bin Malik: The Prophet used to visit all his wives in one night and he had nine wives at that time.

Narrated Qatada: Anas bin Malik said, "The Prophet 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 the strength for it?" Anas replied, "We used to say that the Prophet was given the strength of thirty (men)." And Sa`id said on the authority of Qatada that Anas had told him about nine wives only (not eleven).

Narrated Anas: The Prophet used to go round (have sexual relations with) all his wives in one night, and he had nine wives.

Narrated Anas bin Malik: The Prophet used to pass by (have sexual relation with) all his wives in one night, and at that time he had nine wives.