Exodus 30:14 Midrash

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

Every one that passeth among them that are numbered, from twenty years old and upward, shall give the offering of the LORD.

Read midrashic interpretation of Exodus 30:14: and classical rabbinic exegesis.