Musannaf Ibn Abi Shayba 3:389

Abu Bakr narrated to us, he said: Ibn Fudayl narrated to us, from Husayn, from Hilal ibn Yasaf, from Ja'dah ibn Hubayrah, that he saw a man prostrating while he had a helmet and a turban on, having covered his face with them. So he took his helmet and his turban and threw them behind him.