Ruling on the imam waiting for the ma'mum during ruku'

Question:
Is it obligatory for the imam to wait if he hears them rushing through the air during ruku' or at the end of the final tashahhud?

Answer:
It is better not to be hasty, and it is better for the imam to proceed with care in a way that does not burden the ma'mum, because attending to the ma'mum who are in the front rows is more important, so he should attend to them. However, if he proceeds with a little care so that the latecomer catches up with the imam in ruku', sujud, or tashahhud, that is better and more appropriate for the imam.