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.