'Enemy' in the Bible

Because God fought for them, they killed many of the enemy. They dispossessed the Hagrites and lived in their land until the exile.

three years of famine, or three months of devastation by your foes with the sword of your enemy overtaking you, or three days of the sword of the Lord—a plague on the land, the angel of the Lord bringing destruction to the whole territory of Israel.’ Now decide what answer I should take back to the One who sent me.”