The ruling on an elderly, sick man praying on a chair

Question:
Ibrahim from Jeddah is with us on the line. Go ahead, Ibrahim. Peace be upon you. And upon you, peace. I have three questions, with your permission. Go ahead. My first question is about my grandfather, may Allah grant him health and well-being. He is suffering and sick; he has a slip in his back. So we tell him to pray the obligatory prayer on a chair, but he refuses. What is the ruling if he prays on a chair? Okay, wait a moment while we answer the Shaykh.

Answer:
Yes. He says: His grandfather, Honorable Shaykh, is advanced in age and suffering, and we tell him to pray while on a chair, but he refuses, Honorable Shaykh, or does not respond? If he has a dislike for it, then the prayer is obligatory upon him, so persist with him and explain it to him. But if he has no dislike for it, but rather it is due to old age, then there is no prayer upon him.