Interpreters generally understand by bruise or wound here the state that the Jews should be in the captivity of Babylon, which would be miserable, and so miserable that it would be incurable from any hand, except the hand of God. But I do not understand why it may not as well be interpreted of their sinful state, with reference to God's purpose, and interpreted by 2 Chronicles 36:16, where it is said, The wrath of God arose against them till there was no remedy. They had sinned to that degree that God had resolved into captivity they should go, and there should abide till the determination of seventy years.
Related Commentaries of Jeremiah 30:12
Jeremiah 30:12
12 For thus saith the LORD, Thy bruise is incurable, and thy wound is grievous.