Bilangan 18:3

18:3 They must be responsible to care for you and to care for the entire tabernacle. However, they must not come near the furnishings of the sanctuary and the altar, or both they and you will die.

Imamat 6:12

6:12 but the fire which is on the altar must be kept burning on it. ¹  It must not be extinguished. So the priest must kindle wood on it morning by morning, and he must arrange the burnt offering on it and offer the fat of the peace offering up in smoke on it.

[6:12]  ¹ tn Heb “in it,” apparently referring to the “hearth” which was on top of the altar (cf. the note on v. 9).