(4) باب كَثْرَةِ النِّسَاءِ
Narrated Sa`id bin Jubair:
Ibn `Abbas asked me, "Are you married?" I replied, "No." He said, "Marry, for the best person of this (Muslim) nation (i.e., Muhammad) of all other Muslims, had the largest number of wives."
Reference: Sahih al-Bukhari 5069
In-book reference: Book 67, Hadith 7
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 62, Hadith 7