Cytowanie Komentarza do Psalmów 105:22

לֶאְסֹ֣ר שָׂרָ֣יו בְּנַפְשׁ֑וֹ וּזְקֵנָ֥יו יְחַכֵּֽם׃

Aby poddał książęta jego woli swojéj, a starszych jego mądrości nauczał. 

Sforno

והוא נער, if, in spite of this, he badmouthed his brothers, this was due to his being still an adolescent, not as mature as he should have been or as his intellect made him appear to be. He was not experienced enough to realise what the ultimate effect of his badmouthing his brothers would turn out to be. While it is true that as a relative youngster at 30 he became the mentor of the wisest men in Egypt, the foremost political power, at the tender age of 17 he still had a lot to learn. (compare his wisdom as expressed in Psalms 105,22 where aged people are described as wise, whereas in Shabbat 89 we are taught that mature wisdom cannot be expected to be found amongst the physically young.
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Sforno

זקני ביתו וכל זקני ארץ מצרים, seeing that Yaakov had been considered one of the wise men even in the eyes of the Egyptian intellectual elite. (compare Psalms 105,22 וזקניו יחכם”and to teach his elders wisdom.”)
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Rashbam

ותשב באיתן קשתו, there is a certain heavy and strong bow called arbalatra which is seated on a strong wooden frame called purka, and which, if the archer pulls with all his might bringing his arms all the way back to his body, enables him to shoot the arrow over a longer distance. A weak individual cannot operate such a bow. We have to understand the verse as describing a scenario describing Egyptians shooting their arrows of hate at Joseph until he was imprisoned, bound hand and foot. Nonetheless, the same Joseph afterwards emerged and became king over his former tormentors. This was because his קשת, bow, was stronger than that of his adversaries. He proceeded to imprison his enemies, as we know from Psalms 105,22 לאסור שריו בנפשו “to imprison (discipline) those who had previously demonstrated their hostility against him.
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