The ruling on the imam hastening to raise his head from bowing upon hearing the arrival of a latecomer

Question : Shaykh, may Allah reward you. If a man enters the mosque and the imam is in bowing, and the imam does not notice him—meaning, some people say, “Indeed, Allah is with the patient,” so that the imam becomes aware of him. May Allah preserve you.

Answer : Yes, indeed, some people, when they enter, say, “Indeed, Allah is with the patient,” and sometimes they clear their throats until their voices become hoarse. Yes, so some imams, when they sense this, stand up, even if they have not said “Glory be to my Lord, the Great” even once; they hasten. It is said to this imam, “Why do you do this?” He says, “Because this man might hasten to say the takbir for entering the state of prayer while he is descending into bowing, and his entire prayer would become invalid.”
So I have decided on this matter: from the day I hear someone entering, I raise my head. It was said to me by some of my brothers, may Allah have mercy on him, that they had an imam who did this, and that the boys, when they saw the imam in bowing, would bang their feet as if someone were entering. As soon as he hears this banging, he says, “Allah has heard the praise of those who praise Him,” to hasten for the imam. In any case, everyone has their own perspective, but a person should proceed in accordance with the Shari'ah. We hold that he should be patient, but he should not raise his head as soon as he hears someone entering; he should wait a little so that the latecomer can also be patient in entering and bowing.