Leviticus 9:7 - Exposition

Make an atonement for thyself, and for the people. By means of the sin offering for the high priest, whose sin brought guilt both on himself and upon the people ( Leviticus 4:3 ). After he had (symbolically) purified himself and them of this guilt, he was to offer the offering of the people, which should purify them from the guilt contrasted by their own sins, and make an atonement for them .