When the Messenger of Allah ﷺ arrived at Khaybar in the morning, the people had already taken up their tools and gone out to their fields and lands. When they saw the Prophet ﷺ with the army, they turned back fleeing.The Prophet of Allah ﷺ said, "Allah is the Greatest, Allah is the Greatest. When we descend upon the courtyard of a people, "evil is the morning of those who were warned" [Saffat 37:177]."
حدثنا روح قال حدثنا سعيد بن أبي عروبة عن قتادة عن أنس بن مالك
لما صبح رسول الله ﷺ خيبر وقد أخذوا مساحيهم وغدوا إلى حروثهم وأرضيهم فلما رأوا النبي ﷺ معه الجيش نكصوا مدبرين فقال نبي الله ﷺ الله أكبر الله أكبر إنا إذا نزلنا بساحة قوم {فساء صباح المنذرين}