If impurity is found on the praying person’s clothes after he has finished his prayer, does he have to repeat the prayer, or is it valid?

The Shaykh : If impurity is found on the praying person’s clothes or in the place after he has finished his prayer, does he have to repeat the prayer, or is his prayer valid? The Shaykh: His prayer is valid, as evidenced by the fact that the Messenger (peace and blessings be upon him) prayed one day wearing his sandals, then he took them off, so his Companions took off their sandals while they were praying behind him. After he had said the closing salam, he said to them (peace and blessings be upon him): . They said: We saw you take them off, so we took ours off. He said: . He said, “I took them off when I learned that there was impurity in the sandals.” The meaning of this is that he considered his previous prayer a valid prayer and did not restart the prayer. So if it becomes clear to him at the end of the prayer that there is impurity in the clothes or the place, that does not harm his prayer; it is valid.