Albert Barnes Commentary Jeremiah 44:17

"But we will certainly perform every word that is gone forth out of our mouth, to burn incense unto the queen of heaven, and to pour out drink-offerings unto her, as we have done, we and our fathers, our kings and our princes, in the cities of Judah, and in the streets of Jerusalem; for then had we plenty of victuals, and were well, and saw no evil." — Jeremiah 44:17 (ASV)

Whatsoever thing ... - Or, the whole word (or thing) which has gone forth from our mouth; that is, the vows we have made. They would not let Jeremiah’s expostulations prevent the carrying out of the special object which had brought them together: otherwise the Queen of heaven would be offended, and avenge himself.