Hebrews 5:1

For every high priest is appointed to officiate for men in religious matters, offering gifts and sacrifices for their sins: being chosen from among the people. that as he himself is surrounded with infirmities,

Hebrews 7:27

as those high priests of the law were, to offer up daily sacrifices, first for his own sins, and then for those of the people: having done this once for all, by offering up himself.

Hebrews 8:3-4

every high priest being establish'd to offer gifts and sacrifices: it was necessary that he likewise should make a peculiar offering,

Treasury of Scripture Knowledge

Summary

This is the offering of Aaron and of his sons, which they shall offer unto the LORD in the day when he is anointed; the tenth part of an ephah of fine flour for a meat offering perpetual, half of it in the morning, and half thereof at night.

Bible References

The offering

Hebrews 5:1
For every high priest is appointed to officiate for men in religious matters, offering gifts and sacrifices for their sins: being chosen from among the people. that as he himself is surrounded with infirmities,
Hebrews 7:27
as those high priests of the law were, to offer up daily sacrifices, first for his own sins, and then for those of the people: having done this once for all, by offering up himself.
Hebrews 8:3
every high priest being establish'd to offer gifts and sacrifices: it was necessary that he likewise should make a peculiar offering,