Sulaiman, client of Maimuna said:We came to Ibn ‘Umar at al- Balat* when the people were praying, and I remarked on the fact that he was not praying along with the people. He replied that he had already prayed and that he had heard God’s Messenger say,“Do not pray a prayer twice on the same day.”* A square paved with stones between the Prophet's mosque and the market-place in Medina. Ahmad, Abu Dawud and Nasa’i transmitted it.