The Strength Of Thirty Men (Hadith No. 268)
Volume 1, Book 5, Number 268:
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).
He was definitely not an ordinary man, because he could do justice among all his wives.