Sahih al-Bukhari 5069
Sahih al-Bukhari · Book 67: Wedlock, Marriage (Nikaah) · About (marrying) several women
Narrated Sa`id bin Jubair:
حَدَّثَنَا عَلِيُّ بْنُ الْحَكَمِ الأَنْصَارِيُّ ، حَدَّثَنَا أَبُو عَوَانَةَ ، عَنْ رَقَبَةَ ، عَنْ طَلْحَةَ الْيَامِيِّ ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ ، قَالَ قَالَ لِي ابْنُ عَبَّاسٍ هَلْ تَزَوَّجْتَ قُلْتُ لاَ. قَالَ فَتَزَوَّجْ فَإِنَّ خَيْرَ هَذِهِ الأُمَّةِ أَكْثَرُهَا نِسَاءً.
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."