בִּ֖י אֲדֹנָ֑י מָ֣ה אֹמַ֔ר אַ֠חֲרֵי אֲשֶׁ֨ר הָפַ֧ךְ יִשְׂרָאֵ֛ל עֹ֖רֶף לִפְנֵ֥י אֹיְבָֽיו׃
Ale błagam Panie! cóż mi powiedzieć, gdy podał Israel grzbiet wrogom swoim?
Bereishit Rabbah
It teaches that he gave him the strength of a lion and the audacity of its cubs.