נַפְתָּלִ֖י אַיָּלָ֣ה שְׁלֻחָ֑ה הַנֹּתֵ֖ן אִמְרֵי־שָֽׁפֶר׃ (ס)
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Rabbeinu Bahya
A Midrashic approach: the word לראות, “to see,” means “to see and to be seen.” We read in verse six: ויצא חמור אבי שכם אל יעקב לדבר אתו, Chamor the father of Shechem went out to Yaakov to speak with him.” About this the Tanchuma 7 Vayishlach writes: He said to him: ‘I know that your grandfather Avraham was a prince as the Hittites had acclaimed him as: “you are a prince in our midst” (23,6). I, however, am a prince in the land also. Give the daughter of a prince to a prince (my son) as a wife.” Upon hearing this Yaakov replied: “The title ‘prince’ is applicable only to a שור, ox” (not to a donkey, meaning of the name Chamor.) The Torah had written that Avraham ran to the cattle, (ox) (18,7) and it is written in Proverbs 14,4: ורב תבואות בכח שור, “a bountiful harvest is due to the strength of the ox.” An ox and a donkey cannot mate together. The Torah writes expressly: “you shall not plough with an ox and a donkey together.” In the Book of Prophets (Kings II 14,9) we find the following statement: “The thistle in Lebanon sent the following message to the cedar in Lebanon. ‘give your daughter to my son in marriage.’ But a wild beast in Lebanon went by and trampled down the thistle.” The wild beasts in that parable are the sons of Yaakov who have been compared to wild beasts. In the blessings bestowed on Yaakov’s sons by their father, Yehudah is compared to a lion (49,9); Dan is compared to a snake (49,17); Binyamin is compared to a wolf (49,27); Naftali to a gazelle (49,21). When the Book of Kings spoke about the wild beasts trampling the thistle, the reference was to the sons of Yaakov Shimon and Levi killing the male inhabitants of Shechem. The prophet Hoseah also complains about a similar occurrence in Hoseah 6,9 where he wrote about what would happen to the people of Shechem in his own time because they encouraged depravity. The people would be murdered because they had been guilty of sexual misconduct.
Radak
A tearing and roaring lion: – i.e. a lion which is tearing and roaring, אריה (lion) (here) lacks the kaph of comparison. Similarly we have, “Judah is a lion's whelp” (Gen. 49:9); “Issachar is a strong ass” (ibid. 14); “Naphtali is a hind let loose” (ibid. 21), and such like. The roaring of the lion after he has torn is for joy and pride, as (says) the text (Amos. 3:4): “Will a lion roar in the forest when he hath no prey? Will a young lion cry out of his den if he have taken nothing?” So it is with enemies; after killing and plundering us, they rejoice and behave as insolent boasters.
Rashi
כי חיות הנה signifies they are just as skilful as midwives. The Aramaic for מילדות, midwives, is חיתא (hence the term חיות in this verse). Our Rabbis, however, (taking this word in the sense of animals) gave the following explanation (Sotah 11b): they have been compared to the beasts of the field which do not require the help of midwives. And where are they compared to animals? (Genesis 49:9) “Judah is a young lion”; (Genesis 27) “Benjamin is a wolf that leareth”; (Deuteronomy 33:17) “Joseph is the firstling of his ox”; (Genesis 49:21) “Naphtali is a hind sent forth”. As for the ancestors of those tribes about whom such a comparison is not expressly written Scripture implicitly includes them in the several blessings bestowed upon their brothers, (and thus they also are compared, as their brothers, to animals), for Scripture states, (Genesis 49:28) “And he blessed them etc.” (cf. Rashi on these words). Then, again, it is written, (Ezekiel 19:2) “How was thy mother a lioness!” (The prophet is addressing the princes of Israel as the representatives of the people, and by the term “thy mother” means the progenitors of the nation; the chapter proceeds to speak of the mother’s offspring as “whelps”).