Leviticus 1:5-7

5 The bull shall then be slaughtered [5] before the Lord, and Aaron's sons, the priests, shall offer its blood by splashing it on all the sides of the altar which is at the entrance of the tent of meeting. [AH]

6 Then the burnt offering shall be flayed and cut into pieces.

7 After Aaron's sons, the priests, have put burning embers on the altar and laid wood on them,