Contradiction with Deuteronomy 18:20
This verse states that a prophet who presumes to speak a word in God's name, which God has not commanded, shall die, implying the seriousness of false prophecy, while Jeremiah 29:9 mentions that false prophets are lying, suggesting a contrast in perceived consequences.
Deuteronomy 18:20: But the prophet, which shall presume to speak a word in my name, which I have not commanded him to speak, or that shall speak in the name of other gods, even that prophet shall die.
Contradiction with 1 John 4:1
This verse advises testing the spirits to see if they are from God because many false prophets exist, contradicting Jeremiah 29:9's mention of false prophets by encouraging discernment and testing rather than merely stating their existence.
1 John 4:1: Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.