וַיֵּצְא֨וּ בְנֵֽי־הַנְּבִיאִ֥ים אֲשֶׁר־בֵּֽית־אֵל֮ אֶל־אֱלִישָׁע֒ וַיֹּאמְר֣וּ אֵלָ֔יו הֲיָדַ֕עְתָּ כִּ֣י הַיּ֗וֹם יְהוָ֛ה לֹקֵ֥חַ אֶת־אֲדֹנֶ֖יךָ מֵעַ֣ל רֹאשֶׁ֑ךָ וַיֹּ֛אמֶר גַּם־אֲנִ֥י יָדַ֖עְתִּי הֶחֱשֽׁוּ׃
Сыновья пророков, которые были в Вифлее, пришли к Елисею и сказали ему: 'Знаешь ли ты, что Господь снимет господина твоего с головы твоей сегодня?' И сказал он: 'Да, я знаю это; помолчи'—
Mishneh Torah, Torah Study
Even as man is obliged to instruct his son, so is he obliged to teach his son's son, for it is said: "But make them known to thy sons and thy sons' sons" (Ibid. 4.9); and, not alone to his son and his son's son, but each and every scholar in Israel is commanded to instruct all who desire to be his disciples, even though they be not his sons, for it is said: "And thou shalt teach them diligently unto thy children" (Ibid. 6.7.), which is traditionally interpreted2Sifre, Deut. 11. C. G. to include one's disciples; for disciples, too, are called children, as it is said: "And the sons of the prophets came forth" (Second Kings, 2.3.). If it be so, why then was one commanded to teach his son and his son's son? To permit the precedence of one's son to one's son's son, and his son's son to the son of his fellow.3Sukkah, 30b; Kiddushin, 30. G.
Sefer HaChinukh
The commandment of Torah study: The positive commandment to study the wisdom of the Torah and to teach it; meaning to say how we should perform the commandments, guard ourselves from that which God prevented us and to also know the laws of the Torah according to their true intention. And about all of this is it stated (Deuteronomy 6:7), “You shall teach them to your sons.” And our Rabbis, may their memory be blessed, said (Sifrei Devarim 34:4), “‘Your sons’ — these are your students. And thus do you find that students are called sons, as it is stated (II Kings 2:3), ‘And the sons of the prophets went out.’” And it is [also] said there (Sifrei Devarim 34:1), “‘And you shall teach them (shinantam, which sounds like the word for tooth, hence, make them sharp like a tooth)’ — they shall be ordered in your mouth, so that if a person questions you [concerning them], you will not stammer to him, but answer him forthwith.” And this commandment is repeated in many places, as it is stated (Deuteronomy 5:1), “and study them and do them,” “and in order that you will study them” (Deuteronomy 31:12), “and you shall teach them to your children” (Deuteronomy 11:19).