Remember, when your Lord inspired the Angels: "Indeed, I am with you, so brace those who believe. I will cast terror into the hearts of disbelievers; then you strike at the nape of their necks and cut off the fingertips of each of them!"
As told in verse 8: 17, Messenger threw a hand full of soil against the enemy saying with soul: “Let the faces be distorted”. Thus, the Battle of Bad’r started. Each granule of sand struck the eyes of enemies like a missile. Then the enemies started to cut off themselves. And the believers started to attack them. “When you threw, you didn’t throw, but Lord had thrown” told in verse means, Almighty Lord is doing everything through His servants. So, it was Lord through the Angels made the sand granules struck the eyes of enemies. Angels were not sent down to kill the enemies openly, but they were sent down to make the attack of believers effective on disbelievers. It caused the disbelievers to say about the believers: “These are not humans but Angels”. It is told in verses 75: 3-4: “Lord Allah who differentiated the fingertips of man is indeed, able to assemble his bones on the Day of Resurrection”.
Today there is no group of believers anywhere in the world, and so there is no battle. The believer should holdfast Adhikr—the Unbreakable Rope extended from Paradise to earth as explained in verse 2: 256. If one helps the Impartial Lord by propagating Adhikr which is the Balance and Trust to keep the universe in its equilibrium, Lord will help him back as told in verses 22: 40 and 47: 7. See explanation4: 158; 8: 60 and 9: 40.