Contradiction with Jeremiah 12:14
This verse speaks of God having compassion and bringing back His people and the neighboring nations after plucking them out, which contrasts with the theme of punishment in Jeremiah 50:18.
Jeremiah 12:14: Thus saith the LORD against all mine evil neighbours, that touch the inheritance which I have caused my people Israel to inherit; Behold, I will pluck them out of their land, and pluck out the house of Judah from among them.
Contradiction with Isaiah 14:1
This verse discusses God's mercy and restoration towards Israel, which contradicts the punishment of Babylon and Assyria in Jeremiah 50:18.
Isaiah 14:1: For the LORD will have mercy on Jacob, and will yet choose Israel, and set them in their own land: and the strangers shall be joined with them, and they shall cleave to the house of Jacob.
Contradiction with Exodus 33:19
Here, God says He will show mercy on whom He chooses, opposing the idea of inevitable retribution seen in Jeremiah 50:18.
Exodus 33:19: And he said, I will make all my goodness pass before thee, and I will proclaim the name of the LORD before thee; and will be gracious to whom I will be gracious, and will shew mercy on whom I will shew mercy.
Contradiction with Ezekiel 18:21
This verse implies that repentance can lead to life, contradicting the certainty of punishment described in Jeremiah 50:18.
Ezekiel 18:21: But if the wicked will turn from all his sins that he hath committed, and keep all my statutes, and do that which is lawful and right, he shall surely live, he shall not die.