Leviticus 6:9

“Command Aaron and his sons that this is the law of the burnt offering: The burnt offering is to remain on the hearth of the altar all night, until morning, and the fire must be kept burning on the altar.

Command Aaron and his sons, saying, This is the law of the burnt offering: It is the burnt offering, because of the burning upon the altar all night unto the morning, and the fire of the altar shall be burning in it.