“My understanding is that as far as the appropriateness of apparent actions goes, Sajdah is the next step after Ruku‘. However, if we go directly from Ruku‘ into Sajdah, the clearness of the distinction between standing and Sajdah is not created. The splendor of humility in Sajdah cannot be created until a person falls into prostration from the standing posture. Thus, in reality, this (Qaumah) is an interlude. When we stand for a second time after saying, “Allah hears him who praises Him,” it is a pause between Ruku‘ and Sajdah. The purpose is to make the splendor of Sajdah distinct.” (Khuṭbate Ṭahir, vol. 4, pp. 994, 20 Sept 1985)
“The Imam then straightens up and stands with his arms by his sides. When he initiates this movement, he recites Tasmi‘ loudly which is an indication for the congregation to change the posture from Bowing to Standing. The Tasmi‘ is recited as follows:” (Salat-The Muslim Prayer Book, pp. 42)
Allah hears him who praises Him
“In response the congregation follows the Imam and changes posture as well, and then recite the following which is called Tahmid:” (Salat-The Muslim Prayer Book, pp. 42)
Our Lord! and Yours is the praise, praise which is plenty, pure, and blessed