'Fattening' in the Bible

Why then do you kick at (despise) My sacrifice and My offering which I commanded in My dwelling place, and honor your sons more than Me, by fattening yourselves with the choicest part of every offering of My people Israel?’

Even her mercenaries in her midst [are] like calves of fattening, for they also have turned away, they have fled together. They stand not, for the day of their calamity has come, the time of their punishment.