Numbers 26:61-63

New Revised Standard Version, Anglicised Catholic Edition

⁶¹ But Nadab and Abihu died when they offered unholy fire before the Lord. ⁶² The number of those enrolled was twenty-three thousand, every male one month old and upwards; for they were not enrolled among the Israelites because there was no allotment given to them among the Israelites.

⁶³ These were those enrolled by Moses and Eleazar the priest, who enrolled the Israelites in the plains of Moab by the Jordan opposite Jericho.