Sayyidina Anas narrated : When Allah’s Messenger (SAW) left for Khaybar, he came to it at night. And, whenever he came to a people at night, he did not attack them till it was morning. When morning came, the Jews came out with their baskets and spades. When they saw him, they cried out, “Muhammad’ By Allah, Muhammad with his army.” So, Allah’s Messenger (SAW) said, “Allahu Akbar! Khaybar is ruined. When we descend on a people, (they) the awe-stricken people, encounter an evil morning.”
[Bukhari 2965, Muslim 1365, Ahmed 11992]