2 Chronicles 35:14

And afterward they made ready for themselves, and for the priests: because the priests the sons of Aaron were busied in offering of burnt offerings and the fat until night; therefore the Levites prepared for themselves, and for the priests the sons of Aaron.

Cross-references

Acts 6:2-4 mirrors this delegation: Levites prepared for busy priests, just as deacons were appointed so apostles could focus on prayer and word.

Leviticus 3:5 explains the burning of fat on the altar, which is the very offering the priests were busy with in this verse.