8:57 fa im-maa tathqafan-nahum fiyl Harbi fa shar-rid bihim man khalfahum la'Al-lahum yadh-dhak-karuun

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Ahmed Raza Khan: Mohammed Aqib Qadri:
So if you find them in battle, kill them in a manner which makes those behind them scamper back, in the hope that they may learn a lesson.

Yusuf Ali:
If ye gain the mastery over them in war, disperse, with them, those who follow them, that they may remember.

Pickthal:
If thou comest on them in the war, deal with them so as to strike fear in those who are behind them, that haply they may remember.