Leviticus 6:13

Overview - Leviticus 6
1	The trespass offering for sins done wittingly.
8	The law of the burnt offering;
14	and of the meat offering.
19	The offering at the consecration of a priest.
24	The law of the sin offering.

Leviticus 6:13  (King James Version)
The fire shall ever be burning upon the altar; it shall never go out.