Affirming The Takbir For Every Movement Up Or Down In The Prayer, Except When Rising From Ruku' When One Should Say: Sami'aAllahu Liman Hamidah (Allah Hears Those Who Praise Him) Sahih Muslim 392 e
Translation
Abu Salama reported that Abu Huraira recited takbir in prayer on all occasions of rising and kneeling. We said
O Abu Huraira, what is this takbir? He said: Verily it is the prayer of the Messenger of Allah (ﷺ).