מִבֶּ֛ן עֶשְׂרִ֥ים שָׁנָ֖ה וָמָ֑עְלָה כַּאֲשֶׁר֩ צִוָּ֨ה יְהוָ֤ה אֶת־מֹשֶׁה֙ וּבְנֵ֣י יִשְׂרָאֵ֔ל הַיֹּצְאִ֖ים מֵאֶ֥רֶץ מִצְרָֽיִם׃
’[Take the sum of the people,] from twenty years old and upward, as the LORD commanded Moses and the children of Israel, that came forth out of the land of Egypt.’
Read kabbalistic (mystical) interpretation of Numbers 26:4: and classical mystical sources.