Sayyiduna Abu Huraira (may Allah be pleased with him) narrates: The Prophet Muhammad (peace and blessings be upon him) came and saw that people were performing prayer in a corner of the mosque during the month of Ramadan. The Prophet (peace and blessings be upon him) inquired: Who are these people? It was submitted: These are some people who do not know the Qur'an. Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) is leading them in prayer and they are following his prayer. Then the Prophet (peace and blessings be upon him) said: They have done well (the narrator is in doubt, perhaps these are the words) what they have done is excellent.