Leviticus 6:7-9

⁷This is how the priest will make you right before the Lord, and you will be forgiven whatever sins you may have done that you are guilty of.”

⁸The Lord told Moses,

⁹“Give Aaron and his sons these instructions regarding the burnt offering: The burnt offering is to be left on the fireplace of the altar throughout night until morning, and the fire must be kept burning on the altar.