Leviticus 4:7

‘And he shall put some of the blood on the horns of the altar which is before Yahweh in the tent of meeting; and all the blood he shall pour out at the base of the altar of burnt offering which is at the doorway of the tent of meeting.

‘Then the priest shall take some of the blood of the sin offering with his finger and put it on the horns of the altar of burnt offering; and the rest of its blood he shall pour out at the base of the altar of burnt offering.

‘And the priest shall take some of its blood with his finger and put it on the horns of the altar of burnt offering; and all the rest of its blood he shall pour out at the base of the altar.

‘And the priest shall take some of the blood of the sin offering with his finger and put it on the horns of the altar of burnt offering, and all the rest of its blood he shall pour out at the base of the altar.

‘He shall also sprinkle some of the blood of the sin offering on the side of the altar, while the rest of the blood shall be drained out at the base of the altar: it is a sin offering.

‘But no sin offering, of which any of the blood is brought into the tent of meeting to make atonement in the holy place, shall be eaten; it shall be burned with fire.

Next Moses slaughtered it and took the blood and with his finger put some of it around on the horns of the altar and purified the altar. Then he poured out the rest of the blood at the base of the altar and set it apart as holy, to make atonement for it.

So Aaron came near to the altar and slaughtered the calf of the sin offering which was for himself.

Then Aaron’s sons brought the blood near to him; and he dipped his finger in the blood and put some on the horns of the altar and poured out the rest of the blood at the base of the altar.

“Aaron shall enter the holy place with this: with a bull from the herd for a sin offering and a ram for a burnt offering.

And they brought seven bulls, seven rams, seven lambs, and seven male goats for a sin offering for the kingdom, the sanctuary, and Judah. And he ordered the priests, the sons of Aaron, to offer them on the altar of Yahweh.

And when He opened the fifth seal, I saw underneath the altar the souls of those who had been slain because of the word of God, and because of the witness which they had maintained;