مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2174
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Sa'eed said: Ibn 'Abbas said to me. O Sa’eed, do you have a wife? I said: No. He said: When you go back, get married. Then I came back to him and he said: O Sa’eed, did you get married? I said: No. He said: Get married, for the best among this ummah are those who have the most wives.
Musnad Ahmad 2179Saheeh because of corroborating evidence; al-Bukhari (5069);