Jeremiah 28:9 - Ellicott's Commentary On The Whole Bible

The prophet which prophesieth of peace. — “Peace,” with its Hebrew associations, includes all forms of national prosperity, and is therefore contrasted with famine and pestilence, not less than with war. The obvious reference to the test of a prophet’s work, as described in Deuteronomy 18:22, shows, as other like references, the impression which that book had made on the prophet’s mind.