Leviticus 6:12-13
Leviticus 6:12-13 NASB1995
The fire on the altar shall be kept burning on it. It shall not go out, but the priest shall burn wood on it every morning; and he shall lay out the burnt offering on it, and offer up in smoke the fat portions of the peace offerings on it. Fire shall be kept burning continually on the altar; it is not to go out.