It is narrated from Sayyiduna Abu Sa'id Khudri, may Allah be pleased with him, that a man entered the mosque after the Prophet Muhammad, peace and blessings be upon him, had already led the congregation in prayer. The Prophet, peace and blessings be upon him, said: "Is there no one who will give him charity by praying with him?" Imam Darimi, may Allah have mercy on him, said: He may perform the 'Asr prayer, but if he repeats the Maghrib prayer, he should pray four rak'ahs.