Masruq says: We were with Sayyiduna Abdullah bin Amr (may Allah be pleased with them) when we mentioned Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with them). He said: You have mentioned a person whom I have loved ever since I heard a hadith from the Messenger of Allah (peace and blessings be upon him). I heard him say: Learn the Qur'an from four people: from the son of Umm Abd (i.e., Sayyiduna Abdullah bin Mas'ud)—and he (the Prophet) started with him—and from Ubayy bin Ka'b, and from Salim, the freed slave of Abu Hudhaifah, and from Mu'adh bin Jabal (may Allah be pleased with them).