Xuất Ai Cập Ký 30:14

מבן עשרים שנה ומעלה FROM TWENTY YEARS OLD AND ABOVE — Scripture teaches you here that anyone less than twenty years of age does not go forth to the army nor is he to be counted among the “men” (of whom v. 12 speaks).

כֹּ֗ל הָעֹבֵר֙ עַל־הַפְּקֻדִ֔ים מִבֶּ֛ן עֶשְׂרִ֥ים שָׁנָ֖ה וָמָ֑עְלָה יִתֵּ֖ן תְּרוּמַ֥ת יְהֹוָֽה׃

Every one that passes among them that are numbered, from twenty years old and above, shall give the offering of the Lord.