Numbers 3:1-3

These also are the generations of Aaron and Moses in the day that the LORD spake with Moses in mount Sinai.

And these are the names of the sons of Aaron; Nadab the firstborn, and Abihu, Eleazar, and Ithamar.

These are the names of the sons of Aaron, the priests which were anointed, whom he consecrated to minister in the priest’s office.