﴿ فَلَمْ تَقْتُلُوهُمْ وَلَٰكِنَّ ٱللَّهَ قَتَلَهُمْ ۚ وَمَا رَمَيْتَ إِذْ رَمَيْتَ وَلَٰكِنَّ ٱللَّهَ رَمَىٰ ۚ وَلِيُبْلِىَ ٱلْمُؤْمِنِينَ مِنْهُ بَلَآءً حَسَنًا ۚ إِنَّ ٱللَّهَ سَمِيعٌ عَلِيمٌۭ ﴾

“And yet, [O believers,] it was not you who slew the enemy, but it was God who slew them; and it was not thou who cast [terror into them, O Prophet], when thou didst cast it, but it was God who cast it: and [He did all this] in order that He might test the believers by a goodly test of His Own or daining. Verily, God is all-hearing, all-knowing!”

You did not slay them at Badr by your own might but God slew them by giving you assistance and you threw not O Muhammad (s) against the eyes of the unbelieving folk when you threw the pebbles for a handful of pebbles thrown by a human being cannot strike the eyes of every person in a large troop but God threw by making that throw reach them. He did this in order to vanquish the disbelievers and that He might try the believers with a fair test a fair gift namely booty; surely God is Hearing of their sayings Knowing of their conditions.