Charles Ellicott Commentary Jeremiah 29:31

"Send to all them of the captivity, saying, Thus saith Jehovah concerning Shemaiah the Nehelamite: Because that Shemaiah hath prophesied unto you, and I sent him not, and he hath caused you to trust in a lie;" — Jeremiah 29:31 (ASV)

Send to all them of the captivity. — The words imply something in the nature of another epistle to the exiles, sent, probably, like the previous one, by the hands of envoys from one government to the other. We have no record of the fulfilment of the prediction, but its insertion implies its fulfilment. This frequent communication between Jerusalem and Babylon is noticeable as it:

1. confirms the literal interpretation of the journey to Euphrates in Jeremiah 13:4,
2. and accounts for the special instructions given to Nebuzaradan by Nebuchadnezzar in Jeremiah 39:11.