A man had a wet dream and the weather was cold in the desert, so he delayed the Fajr prayer until the sun had risen. Is his action valid?

Question:
He says: Honorable Shaykh, may Allah grant you success. We went out to the desert, and one of us had a wet dream and did not pray the prayer at its time; rather, he delayed it until the sun had risen. Then he performed ghusl and prayed the Fajr prayer, because on those nights the night was cold and the dawn was cold. Is his action valid?

Answer:
No, because it is not valid. If he is unable to perform ghusl due to the extreme cold, he should perform tayammum, my brother. He should perform tayammum with dust and pray. Praise be to Allah, dust is a means of purification in the case of necessity. 'Amr ibn al-'As (may Allah be pleased with him) did this when he had a wet dream while he was in a military expedition. He was the commander of the expedition, he had a wet dream, and the weather was very cold, so he performed tayammum and led them in prayer. When they presented themselves to the Messenger of Allah (peace and blessings be upon him), they informed him, and he approved of that. Yes.