The ruling on the ma'mum speaking during prayer for the benefit of the prayer

Question:
He says: Honorable Shaykh, may Allah grant you success, what is the ruling on the ma'mum speaking in his prayer if the speech is for the benefit of the prayer, such as telling the imam, "Add a rak'ah," for example?

Answer:
No, it is not permissible; the prayer is invalidated. We were commanded regarding intentional speech that it invalidates the prayer. "Stand before your Lord and bow down" [Quran 2:456], so we were commanded to be silent and forbidden from speaking. But he should glorify Allah instead of speaking. If something happens to you in your prayer, the men should glorify Allah and the women should clap.