مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3484
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Sa'eed bin Jubair said: Ibn ’Abbas (رضي الله عنه) said to me: Get married, for the best of us was the one who had the most wives.
Musnad Ahmad 3507Its isnad is saheeh, al-Bukhari (5069)]