Tafsir of Al-Anfal 8:71

وإن يريدوا خيانتك فقد خانوا الله من قبل

But if they intend to betray you, they indeed betrayed Allah before, meaning,

وإن يريدوا خيانتك

(But if they intend to betray you) in contradiction to what they declare to you by words

فقد خانوا الله من قبل

(they indeed betrayed Allah before), the battle of Badr by committing disbelief in Him,

فٲمكن منهم

So He gave (you) power over them, causing them to be captured in Badr,

والله عليم حكيم

And Allah is All-Knower, All-Wise. He is Ever Aware of his actions and All-Wise in what He decides