Musannaf Ibn Abi Shayba 3:2587

Ibn ‘Ulayyah narrated to us, from Hisham al-Dastawa’i, from Yahya ibn Abi Kathir, from Abu Salamah, from Abu Sa’id al-Khudri, who said: I saw the Messenger of Allah (may Allah bless him and grant him peace) prostrating in water and mud.