Leviticus 4:4-6

Amplified Bible

⁴ He shall bring the bull to the doorway of the Tent of Meeting before the Lord, and shall lay his hand on the bull’s head [transferring symbolically his guilt to the sacrifice] and kill the bull before the Lord. ⁵ Then the anointed priest is to take some of the bull’s blood and bring it into the Tent of Meeting; ⁶ and the priest shall dip his finger in the blood and sprinkle some of it seven times before the Lord in front of the veil (curtain) of the sanctuary.