Deuteronomy 18:22 If what a prophet proclaims in the name of the LORD does not take place or come true, that is a message the LORD has not spoken. That prophet has spoken presumptuously, so do not be alarmed.

A New Prophet
…21"You may say in your heart, 'How will we know the word which the LORD has not spoken?' 22"When a prophet speaks in the name of the LORD, if the thing does not come about or come true, that is the thing which the LORD has not spoken. The prophet has spoken it presumptuously; you shall not be afraid of him.

New American Standard Bible
Cross References

Deuteronomy 18:20
'But the prophet who speaks a word presumptuously in My name which I have not commanded him to speak, or which he speaks in the name of other gods, that prophet shall die.'


Deuteronomy 18:21
"You may say in your heart, 'How will we know the word which the LORD has not spoken?'


1 Kings 22:28
Micaiah said, "If you indeed return safely the LORD has not spoken by me." And he said, "Listen, all you people."


Jeremiah 28:9
"The prophet who prophesies of peace, when the word of the prophet comes to pass, then that prophet will be known as one whom the LORD has truly sent."
Treasury of Scripture

When a prophet speaks in the name of the LORD, if the thing follow not, nor come to pass, that is the thing which the LORD has not spoken, but the prophet has spoken it presumptuously: you shall not be afraid of him.

Deuteronomy 18:22 If what a prophet proclaims in the name of the LORD does not take place or come true, that is a message the LORD has not spoken. That prophet has spoken presumptuously, so do not be alarmed.