What is the ruling on offering

Q 3: Is it permissible for an Imam in a state of Ruku` (bowing) to wait for a newcomer, whose footsteps he hears, lengthening his Ruku` to enable the newcomer to catch up with the Rak`ah (unit of Prayer)? Or, is it impermissible for the Imam to wait for any newcomer?

(Part No. 7; Page No. 420) A: If the Imam, while in a state of Ruku`, will wait for a newcomer to catch up with the Salah for such a short period as may cause no inconvenience to those performing Salah, it will be permissible.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.