Numbers 1:18-20

Complete Jewish Bible

¹⁸ and, on the first day of the second month, they gathered the whole assembly to state their genealogies by families and clans and recorded the names of all those twenty years old and over, as well as their total numbers. ¹⁹ Moshe counted them in the Sinai Desert, just as Adonai had ordered him.

(ii) ²⁰ The men twenty years old and over who were subject to military service were recorded by name, family and clan, starting with the descendants of Re’uven, Isra’el’s firstborn. Here are the totals: