Hazrat Anas (may Allah be pleased with him) narrates that when we conquered Tustar, we saw a grave there in which the body of a man was intact. The people used to seek rain through him. Hazrat Abu Musa wrote a letter to Hazrat Umar regarding this, so Hazrat Umar replied that this is the grave of a prophet because the earth does not consume the bodies of the prophets. And bury him in such a place where no one knows except you and one of your companions. So I and Hazrat Abu Musa took the body and buried it.