Musnad Ahmad Hadith 17967

It is narrated from Safwan bin Ya'la (may Allah be pleased with him) that Ya'la (may Allah be pleased with him) used to say to Farooq-e-Azam (may Allah be pleased with him) that I wish I could see the Prophet (ﷺ) in the state of the descent of revelation. Once, he was at Ji'ranah, and there was a cloth over the blessed body of the Prophet (ﷺ) which was providing shade for him, and some companions (may Allah be pleased with them) were with him, among whom was Umar (may Allah be pleased with him). Meanwhile, a man came who was wearing a cloak and was fragrant with perfume. He came and asked, "O Messenger of Allah! (ﷺ) What is your opinion about a person who, after applying perfume well, puts on a cloak and enters into the state of Ihram for Umrah?" The Prophet (ﷺ) thought for a moment and then remained silent, and revelation began to descend upon him. Umar (may Allah be pleased with him) signaled to Ya'la (may Allah be pleased with him), who came and put his head inside the tent. He saw that the face of the Prophet (ﷺ) was turning red, and for a while, the sound of breathing continued in this state. Then that condition ended, and the Prophet (ﷺ) said, "Where is the person who just asked me about Umrah?" That man was searched for and brought, and the Prophet (ﷺ) said, "Wash off the perfume you have applied three times, take off the cloak, and perform the rites of your Umrah in the same way as you perform the rites of Hajj."