"The Messenger of Allah (ﷺ) said: 'The prayer is not valid if a man does not bring his backbone to rest while bowing and prostrating.'"
Sunan an-Nasa'i Book 11, Hadith 152
← Previous Hadith "Shall I not tell you about the prayer of the Messenger of Allah (ﷺ)? He stood and raised his hands the first time and then he did not do that again."

Sunan an-Nasa'i Book 11, Hadith 151 Next Hadith → "Be moderate in bowing and prostration, and do not rest your forearms along the ground like a dog."

Sunan an-Nasa'i Book 11, Hadith 153