It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him and his family) said to Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him): Allah has commanded me to recite Surah Al-Bayyina before you. Sayyiduna Ubayy (may Allah be pleased with him) asked: Did Allah mention my name before you? The Messenger of Allah (peace and blessings be upon him and his family) replied: Yes. Upon hearing this, Sayyiduna Ubayy (may Allah be pleased with him) began to weep.