לַ֭יִשׁ גִּבּ֣וֹר בַּבְּהֵמָ֑ה וְלֹא־יָ֝שׁ֗וּב מִפְּנֵי־כֹֽל׃
곧 짐승 중에 가장 강하여 아무 짐승 앞에서도 물러가지 아니하는 사자와
Rabbeinu Bahya
יודוך אחיך, “your brothers will acknowledge you.” According to the plain meaning of the text this is a reference to the Israelites eventually acclaiming David, a descendant of Yehudah as their king.
ישתחוו לך בני אביך, “the sons of your father will prostrate themselves before you.” He did not say: “the sons of your mother.” There was no need for him to say that Leah’s sons would acknowledge Yehudah as their leader. The point Yaakov made was that even the sons of his other wives would also acknowledge him as their leader. Yaakov referred to Yehudah (verse 9) as גור אריה instead of as אריה, a fully grown lion. He added the word גור seeing Yehudah had still been a child (less than 20 years old when the brothers first deferred to him). He called him אריה on account of his physical power which [paralleled that of the lion, the king of the beasts. He is also called גבור, to reflect Proverbs 30,30 “the lion is the mightiest of the beasts and recoils before none.” Yehudah is described in similar terms in Chronicles I 5,2.
ישתחוו לך בני אביך, “the sons of your father will prostrate themselves before you.” He did not say: “the sons of your mother.” There was no need for him to say that Leah’s sons would acknowledge Yehudah as their leader. The point Yaakov made was that even the sons of his other wives would also acknowledge him as their leader. Yaakov referred to Yehudah (verse 9) as גור אריה instead of as אריה, a fully grown lion. He added the word גור seeing Yehudah had still been a child (less than 20 years old when the brothers first deferred to him). He called him אריה on account of his physical power which [paralleled that of the lion, the king of the beasts. He is also called גבור, to reflect Proverbs 30,30 “the lion is the mightiest of the beasts and recoils before none.” Yehudah is described in similar terms in Chronicles I 5,2.