Jeremiah 29:25 - Ellicott's Commentary On The Whole Bible

Because thou hast sent letters in thy name... — The letters were probably sent through the envoys named in Jeremiah 29:3 on their return from Babylon. Their object was to urge Zephaniah, who appears in 2 Kings 25:18 as the Sagan, or second priest, to exercise his authority to restrain Jeremiah from prophesying, and to punish him as a false prophet. It was an attempt to turn the tables on him for the manner in which he had thwarted the plans of the party of revolt at Babylon. The part taken by Zephaniah in acting for the king when he wished to consult Jeremiah (Jeremiah 21:1), and imploring his intercession (Jeremiah 37:3), makes it probable that he endeavoured to maintain a neutral Gamaliel-like position between the two parties, and had seemed so lukewarm and temporising that he was open to the influence of threats. On the capture of Jerusalem by Nebuzaradan he was taken prisoner and slain (Jeremiah 52:24-27).