Masruq narrated that when Abdullah bin Mas'ud (may Allah be pleased with him) was mentioned in the presence of Abdullah bin Amr (may Allah be pleased with him), he said, "I will always love him, because I heard the Messenger of Allah (peace and blessings of Allah be upon him) say: 'Learn the Qur'an from four persons: Abdullah bin Mas'ud'—the Prophet (peace be upon him) started with Abdullah bin Mas'ud (may Allah be pleased with him)—'and Salim, the freed slave of Abu Hudhaifah, Ubayy bin Ka'b, and Mu'adh bin Jabal.'"