Bamidbar 26:60-62

Orthodox Jewish Bible

⁶⁰ And unto Aharon was born Nadav, and Avihu, Eleazar, and Itamar.

⁶¹ And Nadav and Avihu died, when they offered eish zarah before Hashem.

⁶² And those that were numbered of them were 23,000, kol zachar from a month old and upward: for they were not numbered among the Bnei Yisroel, because there was no nachalah given them among the Bnei Yisroel.