And offer a sacrifice of thanksgiving with leaven,.... Which some observe was contrary to the law, which forbids all leaven in a meat offering; or "burning" it in any offering, Le 2:11; which the word here used suggests was done by these idolaters, as well as eaten by them, their priests not liking to eat unleavened bread; but; though it was forbidden in the meat offering, was allowed, yea, ordered, with the sacrifice of thanksgiving, Le 7:13.
So Abarbinel understands it here, as what was according, to law, but ironically commanded to be offered to idols:and proclaim [and] publish the free offerings; let all know of them when you make your freewill offerings, and invite them to partake of them:for this liketh you, O ye children of Israel, saith the Lord God; or ye love to offer such sacrifices to your idols, rather than to the Lord God; preferring these to him, and delighting more in the worship of them than of him.