thraxer68
Jeremiah's words as recorded in ch.29 were addressed to the Jewish Exiles in Babylon who were part of that first deportation to Babylon hence suich words of comfort must have been written prior to the Fall and the commencement of the seventy years of Exile-Servitude-Exile. Jeremiah simply informed those earlier exiles that they had to remian in or at Bablon until that ordained period of seventy years had expired.
The translation of Jeremiah 29;10 with that controversial phrase ' at Babylon' is consistent with the context of the chapter and Hebrew grammar. Some scholars prefer 'for Babylon' and this too is permissible for it along with 'at Babylon' proves that the seventy years was a period of Exile-Desolation-Servitude.
scholar JW