Hadith #381 (Jami' al-Tirmidhi)
Book: The Book on Salat (Prayer)
Narrator(s): Aabad bin al-Wam bin عباد بن العوام, Abu Salah Client Of Talha أبو صالح مولى طلحة, Ahmed bin Manay' أحمد بن منيع, Maymun Abu Hamza al-A'wr ميمون أبو حمزة الأعور, Umm Salamah

“The Prophet (S) saw a boy of ours – called Aflah – blowing when he prostrated. So he said: ‘O Aflah! Put your face in the dirt.'”

Source: https://parallelquran.com/hadith/jami-al-tirmidhi-381/