Jeremiah 7:21

Add your burnt offerings unto your sacrifices Burnt offerings were consumed whole, while of sacrifices certain portions were reserved to be eaten by the priest and the offerer. Accordingly the sense here is either(i) appropriate for your own use the offerings of which ye now consume the whole: I care not, for whether ye do this or not ye are breaking a higher law; or(ii) add one sacrifice to another. Multiply your victims ad libitum. They have no sanctity, as offered by your guilty hands, but are merely so much flesh.

In (i), which is the preferable explanation, the reference is to the fact that sacrifices were an occasion of feasting. Turn what ought to be your most solemn act of worship into a mere opportunity for self-indulgence.