NET
9 So if a prophet prophesied peace and prosperity, it was only known that the Lord truly sent him when what he prophesied came true.”
Darby
9 The prophet that prophesieth of peace, when the word of the prophet shall come to pass, shall be known as the prophet whom Jehovah hath really sent.
KJV
9 The prophet which prophesieth of peace, when the word of the prophet shall come to pass, [then] shall the prophet be known, that the LORD hath truly sent him.