Leviticus 4:6

and the priest shall dip his finger in the blood and sprinkle it seven times before Yahweh in front of the veil.

‘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.

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

“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.

“Moreover, he shall take some of the blood of the bull and sprinkle it with his finger on the mercy seat on the east side; also in front of the mercy seat he shall sprinkle some of the blood with his finger seven times.

‘Next Eleazar the priest shall take some of its blood with his finger and sprinkle some of its blood toward the front of the tent of meeting seven times.

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.