Numbers 3:3-5

American Standard Version

³ These are the names of the sons of Aaron, the priests that were anointed, whom he consecrated to minister in the priest’s office. ⁴ And Nadab and Abihu died before Jehovah, when they offered strange fire before Jehovah, in the wilderness of Sinai, and they had no children; and Eleazar and Ithamar ministered in the priest’s office in the presence of Aaron their father.

⁵ And Jehovah spake unto Moses, saying,