It is narrated from Sayyiduna Ibn Amr (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: "Learn the Qur'an from four persons, and he first mentioned Sayyiduna Ibn Mas'ud (may Allah be pleased with him), then Sayyiduna Ubayy ibn Ka'b (may Allah be pleased with him), Sayyiduna Mu'adh ibn Jabal (may Allah be pleased with him), and then Salim (may Allah be pleased with him), the freed slave of Abu Hudhayfah (may Allah be pleased with him)."