(כא) הוּא הָיָה אוֹמֵר, בֶּן חָמֵשׁ שָׁנִים לַמִּקְרָא, בֶּן עֶשֶׂר לַמִּשְׁנָה, בֶּן שְׁלשׁ עֶשְׂרֵה לַמִּצְוֹת, בֶּן חֲמֵשׁ עֶשְׂרֵה לַתַּלְמוּד, בֶּן שְׁמֹנֶה עֶשְׂרֵה לַחֻפָּה, בֶּן עֶשְׂרִים לִרְדֹּף, בֶּן שְׁלשִׁים לַכֹּחַ, בֶּן אַרְבָּעִים לַבִּינָה, בֶּן חֲמִשִּׁים לָעֵצָה...
(21) Judah ben Tema used to say: five years of age for the study of Scripture; ten for the study of Mishnah; thirteen for the commandments; fifteen for the study of Talmud; eighteen for the bridal canopy; twenty for pursuit [of a livelihood]; thirty for the peak of strength; forty for wisdom; fifty for [giving] counsel...
ת"ר האב חייב בבנו למולו ולפדותו וללמדו תורה ולהשיאו אשה וללמדו אומנות וי"א אף להשיטו במים
A father is obligated with regard to his son to circumcise him, and to redeem him if he is a firstborn son who must be redeemed by payment to a priest, and to teach him Torah, and to marry him to a woman, and to teach him a trade. And some say: A father is also obligated to teach his son to swim.
(א) אֵלּוּ דְבָרִים שֶׁאֵין לָהֶם שִׁעוּר. הַפֵּאָה, וְהַבִּכּוּרִים, וְהָרֵאָיוֹן, וּגְמִילוּת חֲסָדִים, וְתַלְמוּד תּוֹרָה.
(1) These are the things that have no definite quantity: The corners [of the field]. First-fruits; [The offerings brought] on appearing [at the Temple on the three pilgrimage festivals]. The performance of righteous deeds; And the study of the torah.