Musnad Ahmad 32:1695

'Affan narrated to us, Hammam narrated to us, Qatadah narrated to us, from Anas, who said: "Indeed, We have given you a clear conquest" [Al-Fath: 1] to the end of the verse, was revealed to the Prophet, may Allah bless him and grant him peace, upon his return from Al-Hudaybiyah, while his companions were intermingled with sadness and distress. He said: "A verse has been revealed to me that is more beloved to me than the world and everything in it." He said: When the Prophet of Allah, may Allah bless him and grant him peace, recited it, a man from the people said: "Congratulations and pleasantness! Allah has made clear to you what He will do with you, so what will He do with us?" Then Allah, the Almighty and Majestic, revealed the verse that follows it: "That He may admit the believing men and the believing women to gardens beneath which rivers flow" [Al-Fath: 5], until the end of the verse.