Hebrews 5:1

For every high priest being taken from among men, is appointed for men in things pertaining to God, that he may offer both gifts and sacrifices for sins,

Hebrews 7:27

Who needeth not daily, as those high priests, to offer up sacrifices, first for his own sins, then for those of the people: for this he did once for all, when he offered up himself.

Hebrews 8:3-4

For every high priest is ordained to offer up gifts and sacrifices; whence it was necessary, that this also should have somewhat to offer.

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 being taken from among men, is appointed for men in things pertaining to God, that he may offer both gifts and sacrifices for sins,
Hebrews 7:27
Who needeth not daily, as those high priests, to offer up sacrifices, first for his own sins, then for those of the people: for this he did once for all, when he offered up himself.
Hebrews 8:3
For every high priest is ordained to offer up gifts and sacrifices; whence it was necessary, that this also should have somewhat to offer.