Sahih al-Bukhari 3647

ʿAli ibn ʿAbdullah narrated to us: Sufyan narrated to us: Ayyub narrated to us, from Muhammad, who said: I heard Anas ibn Malik (may Allah be pleased with him) say: The Messenger of Allah ﷺ arrived at Khaybar early in the morning while its people had gone out with their shovels. When they saw him, they cried, “Muhammad and the army!” and hurried back toward the fortress. The Prophet ﷺ raised his hands and said, “Allah is the Greatest! Khaybar is ruined. When we descend upon the territory of a people, evil is the morning of those who were warned.”