בִּנְיָמִין֙ זְאֵ֣ב יִטְרָ֔ף בַּבֹּ֖קֶר יֹ֣אכַל עַ֑ד וְלָעֶ֖רֶב יְחַלֵּ֥ק שָׁלָֽל׃
Benyamin adalah serigala yang menerkam; pada pagi hari ia melahap mangsanya, dan pada petang hari ia membagi-bagikan rampasan.”
Rashi
בנימן זאב יטרף means BENJAMIN IS A WOLF THAT TEARETH (i.e. “wolf” is not the object of the sentence but the word אשר must be supplied before יטרף). He prophesied that they (Benjamin’s descendants) will be “rapacious” in the time to come; thus the Benjamites were told (Judges 21:21) “and catch you every man his wife”, as you will find in the story of the concubine of Gibeah. Further he was prophesying concerning Saul (who was of this tribe) who vanquished his enemies on all sides, as it is said (1 Samuel 14:47) “So Saul took the kingdom… and fought on every side… against Moab… and against Edom… and whithersoever he turned himself he put them to the worse”.
Chizkuni
בנימין זאב, “Binyamin is like wolf;” a metaphor implying that the kingdom of Shaul, a descendant of Binyamin, would not endure, just as a wolf does not spend time with his prey. On the other hand, the Kingdom of David is compared to that of a lion, which does spend time with its prey, not being afraid of anyone challenging it. (Compare Torah Shleymah on this verse)
Rashbam
בנימין זאב יטרף, Yaakov prophesies concerning the first crowned Jewish King, Sha-ul, member of the tribe of Binyamin. He would successfully deal with the enemies surrounding Israel as documented in Samuel I 14,47בכל אשר יפנה ירשיע, “wherever he turned he defeated them.” The tribe of Binyamin also remained loyal to the dynasty of David when the ten tribes split under Jerobam. When King Assa conducted wars against surrounding enemy states, Binyamin supported him. The same held true under the reign of the kings Yehoshaphat and Chizkiyah, both Kings of the Davidic dynasty.