ציטירנדיקער פּירוש אויף דברים 33:17

בְּכ֨וֹר שׁוֹר֜וֹ הָדָ֣ר ל֗וֹ וְקַרְנֵ֤י רְאֵם֙ קַרְנָ֔יו בָּהֶ֗ם עַמִּ֛ים יְנַגַּ֥ח יַחְדָּ֖ו אַפְסֵי־אָ֑רֶץ וְהֵם֙ רִבְב֣וֹת אֶפְרַ֔יִם וְהֵ֖ם אַלְפֵ֥י מְנַשֶּֽׁה׃ (ס)

זײַן ערשטגעבאָרענער אָקס, ער האָט פּראַכט, און הערנער פֿון אַ װיזלטיר זײַנען זײַנע הערנער; מיט זײ װעט ער שטױסן די פֿעלקער, די עקן פֿון דער ערד מיטאַנאַנדער; און דאָס זײַנען די צענטױזנטן פֿון אפֿרים, און דאָס זײַנען די טױזנטן פֿון מנשה.

Radak

My horn is exalted: The attacker is called, a horn, since it is the highest place on a beast. It is also that the horns of a wild animal attack, as it is stated (Deuteronomy 33:17), "through them, nations are gored." And in a man, it is by way of a metaphor; and it is as if it said, "My head is high" - as it is stated (Psalms 27:6), "And now, my head will be raised over my enemies." And all of this is "through the Lord," who helped me.
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Bartenura

שהוא קרן – and it is not called a Shofar, as it is written (Deuteronomy 33:17): “Like the firstling bull in his majesty, he has horns like the horns of a wild ox; [with them he gores the peoples…].” But regarding the Shofar, it is written (Leviticus 25:9): “Then you shall sound the horn loud…” And we learn Rosh Hashanah from the Jubilee [year].
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Chizkuni

על דגלו באותות, “every man with his own standard according to the insignias of his father’s house;” the flags had the names of the (fore)father’s houses inscribed upon them. How did this work? On the flag of Reuven there was an inscription אי׳י, the respective first letters of the names of the patriarchs אברהם, יצחק, יעקב. On the second flag (there were four flags, one for each army group of three tribes.) there were inscribed the letters בצ׳ע, the second letter in the names of each of the three patriarchs. The third flag would have the letters רח׳ק representing the third letter in the respective names of Avraham, Yitzchok and Yaakov, and the fourth flag the letters מק׳ב, representing the last letters each in their names. The letter ה which had been added to Avraham’s name, would be represented by the protective cloud that rested above the Israelites and protected them against nosy intruders during all the years they were in the desert. An alternate interpretation of the line: באותות לבית אבותם. The flag of the camp of Reuven had the outline of a human being in red colour, matching the colour of his stone on Aaron’s breastplate. It represented the mandrakes Reuven had found in the field and brought to his mother Leah, which the latter had traded for an extra night with her husband. (Genesis chapter 30) These mandrakes were shaped like a human being. The outline of a lion was drawn or stitched on the flag of Yehudah, who was called: “lion” in the Torah by his father (Genesis 49,9) The colour of that outline was turquoise as was the colour of his gem on Aaron’s breastplate. The flag of Ephrayim showed the outline of an ox, whom his father Joseph had reputedly called שור, ox, (Deuteronomy 33,17) The colour of that outline was onyx, as was the colour of his gemstone on the breastplate of Aaron. On the flag of Dan there was the outline of an eagle, coloured in a variety of colours, iridescent, as the gemstone that represented the tribe of Dan on Aaron’s breastplate. (Ibn Ezra) The Tabernacle located in the centre, was flanked by all these camps, and was a symbol of the holy angels called chayot, which surround the throne of G-d forming a square. The various nations learned from the Israelites to make tablecloths and the like in a variety of colours. (Bamidbar Rabbah 2,6)
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Rashi

עגל מסכה A MOLTEN CALF — As soon as he (Aaron) had thrown it (the gold) into the fire in a melting pot the magicians amongst the mixed multitude who had come up with them from Egypt came and made it (the golden calf) by their magic art. There are some who say that Micah the idolator mentioned in Judges ch. 17, was there, who had been drawn forth from the foundations of a building in Egypt where he was nearly crushed. He had in his possession a “supernatural name” (שם) and a plate upon which Moses had written: “Come up, ox, come up, ox!” in order to raise the coffin of Joseph who is compared to an ox (cf. Deuteronomy 33:17) out of the Nile, and he cast it (the plate) into the melting pot and the calf (the young ox) came out (ויצא העגל הזה) (Midrash Tanchuma, Ki Tisa 19).
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