Musnad Ahmad 30:271

Sufyan narrated to us, from ‘Amr, from Ibn Munabbih—meaning Wahb—from his brother: I heard Abu Hurayrah saying: "There is no one who has more hadith from the Messenger of Allah, may Allah bless him and grant him peace, than me, except for ‘Abdullah ibn ‘Amr, for he used to write, and I did not use to write."