מדרש על שמואל ב 22:41

Thy hand shall be upon the neck of thine enemies (ibid.). This refers to David, who would descend from him: Thou hast made mine enemies turn their backs unto me (II Sam. 22:41).

It teaches that he gave him the strength of a lion and the audacity of its cubs.

..."Until he comes to Shiloh" - the one to whom the kingdom is his (shelo); "and to him will be a gathering of peoples" - the one to whom the nations of the world will stream, as it is stated (Isaiah 11:10), "the stock of Jesse that has remained standing shall become a standard to peoples—nations shall seek his counsel"...