Numbers 26:59-61

Amplified Bible

⁵⁹ The name of Amram’s wife was Jochebed, the daughter of Levi, who was born to Levi in Egypt; and to Amram she bore Aaron, Moses, and Miriam their sister. ⁶⁰ To Aaron were born Nadab, Abihu, Eleazar, and Ithamar. ⁶¹ But Nadab and Abihu died [in the presence of God] when they offered [in their ceremonial censers] strange [unholy, unacceptable, unauthorized] fire before the Lord.^(A)