I had major ritual impurity in the desert, so I performed ablution but did not take a full bath due to the cold weather, and I prayed with my companions. What is the ruling?

Question:
Peace be upon you. Your Eminence, the father, the questioner says: More than ten years ago, I was out with my group on a trip to the desert for a few days. He says: I wish you well. More than ten years ago. More, more. He says: More than ten years ago, I was out with my group on a trip to the desert for a few days, and on one of the days I went far away and had major ritual impurity, but I did not take a full bath because I could not find a place, and the water needed to be heated. However, I performed ablution. When the time for the sunset prayer came, they made me the imam, so I prayed with them, and likewise for the night prayer. When I returned home the next day, I took a full bath and repeated the two prayers. Do I owe anything?

Answer:
If you say that the water is cold and you cannot heat it, because you are in the desert and cannot heat it, then perform dry ablution, my brother. Dry ablution takes the place of water and removes major ritual impurity. If you performed dry ablution because you were unable to use water, your prayer is valid, and the prayer of those behind you is valid. But if you were able to heat the water but did not do so, your prayer is not valid. You must repeat the prayer and order your brothers who prayed behind you to repeat the prayer. Yes.