Matthew Poole and continuators on Jeremiah 51:9

9 We would have healed Babylon, but she is not healed , forsake her, and let us go every one to his own country , for her judgment reacheth unto heaven, and is lifted up even to the skies .

The Prophet here seemeth to personate the mercenary Souldiers that should come to help the Chaldeans, as if they should say this, they would have helped Babylon, but there was no healing for her.

And therefore they call one to another to leave her to her self, and return each man to his own Countrey.

For her punishment was very great, her case too sad for them to help. The reaching of things to the Heavens, and lifting them up to the skies are phrases used to signifie high and great measures, and degrees of things so expressed Gen. 11.4. Deut. 1.28. Psal. 107.26.