Takhrij Hadith 406: "I spent the night with…"

I spent the night with the Messenger of Allah ﷺ, and I saw a person with him. He said to me: "O Hudhayfah, did you see him?" I replied: "Yes, O Messenger of Allah." He said: "This is an angel who had never descended to me since I was sent as a Prophet. He came to me tonight to give me the glad tidings that al-Hasan and al-Husayn are the leaders of the youth of Paradise.