Combining the 'Isha' and Maghrib prayers due to the cold weather

Question:
He says: Honorable Shaykh, may Allah grant you success. An imam in a city outside Riyadh combined the 'Isha' and Maghrib prayers because the weather was cold. Some people objected to him and told him that your prayers are invalid and you must repeat them. What is the legal ruling in this matter?

Answer:
Yes, and that is correct. Cold weather does not permit combining the prayers, because there is hardly a night in the winter nights that does not have cold weather. Mere coldness, no. If there is rain that wets the clothes or if there is mud, yes. But mere coldness, hardly a night in the winter nights is free from it, so combining is not permissible. It is upon the one who hinders the prayer. And it is regrettable that some of the young people, may Allah guide them, exert themselves in incorrect independent legal reasoning that no one has preceded them in. This is playing with worship and playing with the religion and creating confusion among the people. Yes.