Exodus 27:21

27:21 In the tent of meeting ¹  outside the curtain that is before the testimony, Aaron and his sons are to arrange it from evening ²  to morning before the Lord. This is to be a lasting ordinance among the Israelites for generations to come. ³ 

Exodus 40:15

40:15 and anoint them just as you anointed their father, so that they may minister as my priests; their anointing will make them a priesthood that will continue throughout their generations.”

Numbers 3:10

3:10 So you are to appoint Aaron and his sons, and they will be responsible for their priesthood; ⁴  but the unauthorized person ⁵  who comes near must be put to death.”

¹ tn The LXX has mistakenly rendered this name “the tent of the testimony.”

² sn The lamps were to be removed in the morning so that the wicks could be trimmed and the oil replenished (30:7) and then lit every evening to burn through the night.

³ sn This is the first of several sections of priestly duties. The point is a simple one here: those who lead the worship use the offerings of the people to ensure that access to God is illumined regularly. The NT will make much of the symbolism of light.

⁴ tc The LXX includes the following words here: “and all things pertaining to the altar and within the veil.” Cf. Num 18:7.

⁵ tn The word is זָר (zar), usually rendered “stranger, foreigner, pagan.” But in this context it simply refers to anyone who is not a Levite or a priest, an unauthorized person or intruder in the tabernacle. That person would be put to death.