שְׂא֞וּ אֶת־רֹ֣אשׁ ׀ כָּל־עֲדַ֣ת בְּנֵי־יִשְׂרָאֵ֗ל מִבֶּ֨ן עֶשְׂרִ֥ים שָׁנָ֛ה וָמַ֖עְלָה לְבֵ֣ית אֲבֹתָ֑ם כָּל־יֹצֵ֥א צָבָ֖א בְּיִשְׂרָאֵֽל׃
’Take the sum of all the congregation of the children of Israel, from twenty years old and upward, by their fathers’houses, all that are able to go forth to war in Israel.’
Read kabbalistic (mystical) interpretation of Numbers 26:2: and classical mystical sources.