Jeremiah 10:11 - Ellicott's Commentary On The Whole Bible

Thus shall ye say unto them. — The verse presents an almost unique phenomenon. It is not, like the rest of the book, in Hebrew, but in Chaldee or Aramaic, the language of the enemies of Israel. Two explanations have been offered — (1) that a marginal note, added by one of the exiles in Babylon, found its way at a later period into the text; (2) a far more probable view, viz., that the prophet, whose intercourse with the Chaldeans had made him familiar with their language, put into the mouths of his own countrymen the answer they were to give when they were invited to join in the worship of their conquerors. Little as they might know of the strange language, they might learn enough to give this answer. The words have the ring of a kind of popular proverb, and in the original there is a play of sound which can only be faintly reproduced in English — The gods that have not made... they shall be made away with. The apocryphal Epistle of Jeremiah, already referred to, may, perhaps, be regarded as a rhetorical sermon on this text.