Jeremiah 29:25

Thus speaketh the LORD of hosts, the God of Israel, saying, Because thou hast sent letters in thy name unto all the people that are at Jerusalem, and to Zephaniah the son of Maaseiah the priest, and to all the priests, saying,

The verse stands within the recorded exchange of letters between Jeremiah and the Hebrew captives. That correspondence includes letters sent by false prophets to the captives in exile. It also includes letters sent to the authorities in Jerusalem.