“Summon archers
Against Babylon!
All who bend the bow!
Encamp all around her!
Let no one escape!
Repay her
According to her deeds!
Just as she had done,
Do to her!
She has arrogantly
Defied Yahweh,
The Holy One of Israel!”
Like earlier in this chapter, the main fighters against Babylon were the archers with their bows and arrows. They were to surround Babylon, and not let anyone get away. They were to repay her for the deeds that that she had done. They should do unto her, what she had done to them. Babylon had been arrogant in defying Yahweh, the Holy One of Israel, so that she deserved what she got.
Eugene Finnegan Bible Project 