1 Samuel 17:45-46 David replied to the Philistine, “You come to me with sword, spear, and javelin, but I come to you in the name of the LORD of Heaven’s Armies-the God of the armies of Israel, whom you have defied. Today the LORD will conquer you, and I will kill you and cut off your head. And then I will give the dead bodies of your men to the birds and wild animals, and the whole world will know that there is a God in Israel!
When you disobey God, He can allow your enemy to defeat you. Nahum 1:12 This is what the LORD says: “Though the Assyrians have many allies, they will be destroyed and disappear. O my people, I have punished you before, but I will not punish you again.