Numbers 4:16-20

16“The responsibility of Eleazar the son of Aaron the priest is 1the oil for the light and the 2fragrant incense and 3the continual grain offering and 4the anointing oil--the responsibility of all the 5tabernacle and of all that is in it, with the sanctuary and its furnishings.”

17Then the Lord spoke to Moses and to Aaron, saying, 18“Do not let the tribe of the families of the Kohathites be cut off from among the Levites. 19But do this to them that they may live and 6not die when they approach the most holy objects: Aaron and his sons shall go in and assign each of them to his work and to his load; 20but 7they shall not go in to see the holy objects even for a moment, or they will die.”