Leviticus 6:7-9

⁷and the priest shall make atonement for him before Jehovah; and he shall be forgiven concerning whatsoever he doeth so as to be guilty thereby.

⁸And Jehovah spake unto Moses, saying,

⁹Command Aaron and his sons, saying, This is the law of the burnt-offering: the burnt-offering shall be on the hearth upon the altar all night unto the morning; and the fire of the altar shall be kept burning thereon.