Exodus 29 · a question people ask
God chose Aaron. Why did Aaron need atonement?
The chapter doesn't leave the priests out. Aaron and his sons lay their hands on the bull of the sin offering (29:10, 29:14), and they eat "those things with which atonement was made, to consecrate and sanctify them" (29:33). When Moses carried it out, he said, "What has been done today, so the LORD has commanded to do, to make atonement for you" (Leviticus 8:34). Hebrews says the same of every high priest: "he must offer sacrifices for sins for the people, as well as for himself" (Hebrews 5:3). It sets Jesus apart on exactly this point: he "doesn’t need, like those high priests, to offer up sacrifices daily, first for his own sins, and then for the sins of the people. For he did this once for all, when he offered up himself" (Hebrews 7:27).
The verses
“They shall eat those things with which atonement was made, to consecrate and sanctify them; but a stranger shall not eat of it, because they are holy.”
“What has been done today, so the LORD has commanded to do, to make atonement for you.”
“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. The high priest can deal gently with those who are ignorant and going astray, because he himself is also surrounded with weakness. Because of this, he must offer sacrifices for sins for the people, as well as for himself.”
“For such a high priest was fitting for us: holy, guiltless, undefiled, separated from sinners, and made higher than the heavens; who doesn’t need, like those high priests, to offer up sacrifices daily, first for his own sins, and then for the sins of the people. For he did this once for all, when he offered up himself.”