Lev 4:11-12, Heb 7:27, Heb 13:11-12, 9:11-12, 10:1,14

In the Old Testament, the high priests offered daily sacrifices to God for the forgiveness of the sins of the people. (Ex 29:10-14; Lev 4:11)

Ex 29:10 And thou shalt cause a bullock to be brought before the tabernacle of the congregation: and Aaron and his sons shall put their hands upon the head of the bullock. 11 And thou shalt kill the bullock before the Lord, by the door of the tabernacle of the congregation. 12 And thou shalt take of the blood of the bullock, and put it upon the horns of the altar with thy finger, and pour all the blood beside the bottom of the altar. 13 And thou shalt take all the fat that covereth the inwards, and the caul that is above the liver, and the two kidneys, and the fat that is upon them, and burn them upon the altar. 14 But the flesh of the bullock, and his skin, and his dung, shalt thou burn with fire without the camp: it is a sin offering.

Lev 4:11 And the skin of the bullock, and all his flesh, with his head, and with his legs, and his inwards, and his dung,

Jesus offered Himself to God once for all, so that the sins of those who believed in Him as the Christ were completely and forever forgiven by God (Hebrews 7:27, Heb 13:11-12, Heb 9:11-12, Heb 10:1,14)

Hebrews 7:27 Who needeth not daily, as those high priests, to offer up sacrifice, first for his own sins, and then for the people's: for this he did once, when he offered up himself.

Heb 13:11 For the bodies of those beasts, whose blood is brought into the sanctuary by the high priest for sin, are burned without the camp. 12 Wherefore Jesus also, that he might sanctify the people with his own blood, suffered without the gate.

Heb 9:11 But Christ being come an high priest of good things to come, by a greater and more perfect tabernacle, not made with hands, that is to say, not of this building; 12 Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.

Heb 10:1 For the law having a shadow of good things to come, and not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect. 14 For by one offering he hath perfected for ever them that are sanctified.