Abu Humaid reported to the same effect. He said:When he (the Prophet) prostrated he kept his thighs wide and did not let his belly touch the thighs. Abu Dawud says that Ibn Mubarak narrated this hadith from ‘Abbas b. Sahl, which he did not remember well. It is thought that he has mentioned ‘Isa b. ‘Abd Allah, ‘Abbas b. Sahl and Abu Humaid al-Sa’idi

English translation · Sunan Abu Dawud