Hazrat Anas bin Malik (may Allah be pleased with him) narrated that the Prophet Muhammad (peace and blessings be upon him) said to Ubayy bin Ka'b (may Allah be pleased with him): Allah Almighty has commanded me to recite to you Surah "Lam Yakunilladhina Kafaru." Ubayy bin Ka'b (may Allah be pleased with him) asked, "Did Allah mention my name?" The Prophet (peace and blessings be upon him) replied, "Yes." Upon this, Ubayy bin Ka'b (may Allah be pleased with him) began to weep out of extreme joy.