Abu Talha reported,

When the Prophet of Allah ﷺ came upon Khaybar in the early morning, its people had already taken up their tools and set out to their fields and farmlands. When they saw the Prophet of Allah ﷺ with the army, they turned and fled. The Prophet of Allah said, "Allahu Akbar, Allahu Akbar. When we descend upon the territory of a people, evil is the morning of those who were warned."

Ahmad 16347

Sahih

حدثنا روح حدثنا سعيد بن أبي عروبة عن قتادة عن أنس بن مالك

عن أبي طلحة قال

لما صبح نبي الله ﷺ خيبر وقد أخذوا مساحيهم وغدوا إلى حروثهم وأرضهم فلما رأوا نبي الله ﷺ معه الجيش ركضوا مدبرين فقال نبي الله الله أكبر الله أكبر إنا إذا نزلنا بساحة قوم فساء صباح المنذرين

أحمد 16347صحيح
Contents
Reference
Commentary
Ayat
Collection
Musnad Ahmad
Book
Abu Talha Zayd bin Sahl Ansari
Numbering
Darussalam 16347
Ahmad 16347