Our Shaykh, Muḥammad ibn Ḥizām, may Allāh preserve him, was asked the following question:

Question: “Is it correct for the one who is crippled or can’t stand to lead the people in prayer?”

Answer: “Those who have excuses from whose prayers have a deficiency due to them being crippled, or their limbs missing, or those whose purity is incomplete due to some sickness or disease, then their ruling is no different to others; the ruling regarding them is like that of others in that their prayer is valid and it is correct for them to lead. Those praying behind them should pray standing whereas the command to pray sitting behind an imām who leads sitting is only if it is out of the ordinary – for a reason.” End. [Reference]

Translated by

Majid Jawed Al-Afghanee
Abu Aisha