"Allah's Messenger would say the Takhir while he was going down."
Jami` at-Tirmidhi Book 2, Hadith 106
← Previous Hadith "Allah's Messenger would say the Takbir for every lowering and raising, standing and sitting, and (so did) Abu Bakr and Umar."

Jami` at-Tirmidhi Book 2, Hadith 105 Next Hadith → his father (Ibn Umar) who said: "I saw Allah's Messenger when he opened the Salat, raising his hands to the level of his shoulders, and (again) when he bowed, and when he raised his head from bowing." In his narration, Ibn Abi Umar added: "And he wuld not raise them between the two prostrations."

Jami` at-Tirmidhi Book 2, Hadith 107