וַֽיִּגְדְּלוּ֙ הַנְּעָרִ֔ים וַיְהִ֣י עֵשָׂ֗ו אִ֛ישׁ יֹדֵ֥עַ צַ֖יִד אִ֣ישׁ שָׂדֶ֑ה וְיַעֲקֹב֙ אִ֣ישׁ תָּ֔ם יֹשֵׁ֖ב אֹהָלִֽים׃
그 아이들이 장성하매 에서는 익숙한 사냥군인고로 들사람이 되고 야곱은 종용한 사람인고로 장막에 거하니
Rashi on Genesis
ויגדלו… ויהי עשו AND THEY GREW … AND ESAU WAS — So long as they were young they could not be distinguished by what they did and no one paid much attention to their characters, but when they reached the age of thirteen, one went his way to the houses of learning and the other went his way to the idolatrous temples (Genesis Rabbah 63:10).
Rashbam on Genesis
יודע ציד, hunting venison and retrieving the animal to serve as food.
Radak on Genesis
ויגדלו הנערים, as soon as they grew up their activities diverged completely from one another, one concentrating on mundane activities, activities which showed immediate profitable results, the other concentrating on the acquisition of knowledge, wisdom, i.e. abstract matters. One was an extrovert, at home in the fields, mountains, etc, whereas the other was an introvert as reflected in the term יושב אהלים.