Moses conducts a census of the Israelites; G-d describes the unique duties of the Kohath family of priests. G-d told Moses to, “Take a total count of the entire community of the sons of Israel according to their families, according to their father’s house, counting the names of all males twenty years old and upward.” But the Levites were not allowed to number themselves among them. For you shall appoint the Levites over the Dwelling Place of the Testimony. They shall carry the Dwelling Place of the Tent of Appointed Meeting and minister to it and camp around it. All the other sons of Israel shall camp with their own tribe, according to their divisions, at some distance around the Tent of Appointed Meeting. Each of the descendants of Aaron (Moses’ brother) were anointed as priests, but Nadab and Abihu died when they brought a strange fire before G-d. Since they had no sons, only Eleazar and Ithamar remained to minister as priests.