Cross reference
Numbers 26:60
60 And unto Aaron was born Nadab, and Abihu, Eleazar, and Ithamar.
Numbers 3:2
2 And these are the names of the sons of Aaron; Nadab the firstborn, and Abihu, Eleazar, and Ithamar.
Numbers 3:8
8 And they shall keep all the instruments of the tabernacle of the congregation, and the charge of the children of Israel, to do the service of the tabernacle.