Albert Barnes Commentary Jeremiah 16:13

"therefore will I cast you forth out of this land into the land that ye have not known, neither ye nor your fathers; and there shall ye serve other gods day and night; for I will show you no favor." — Jeremiah 16:13 (ASV)

And there you shall ... - Ironical, and “there you may serve other gods day and night, since I will show you no favor.”