Leviticus 4:31

Then he must remove all of its fat (just as fat was removed from the peace offering sacrifice) and the priest must offer it up in smoke on the altar for a soothing aroma to the Lord. So the priest will make atonement ¹  on his behalf and he will be forgiven. ² 

Ex 29:18; Le 1:9,13,17; Le 3:3-5,9-11,14-16; Le 3:3,5; Le 4:8-10,19,26,35; Le 4:26,35; Le 8:21; Ezr 6:10; Job 42:8; Ps 40:6,7; Ps 51:16,17; Ps 69:30,31; Isa 42:21; Isa 53:10; Mt 3:17; Eph 5:2; Heb 1:3; Heb 9:12,14,15; Heb 10:12,14; 1Pe 2:4,5; 1Jo 1:7; 1Jo 4:9,10; Re 5:9

¹ sn The focus of sin offering “atonement” was purging impurities from the tabernacle (see the note on Lev 1:4).

² tn Heb “there shall be forgiveness to him” or “it shall be forgiven to him” (KJV similar).