The princes of the people are gathered together, (even) the people of the God of Abraham - rather, as Arabic, 'The princes of the peoples (plural) are gathered together TO the people (singular) of the God of Abraham.' The pagan princes flock together to be received among the people Yahweh . Thus, the prophecy of Jacob concerning Messiah (Shiloh) shall come to pass fully: "Unto Him shall the gathering of the people be" (Genesis 49:10; Psalms 87:4; Isaiah 60:3-8). The designation, "God of Abraham," is appropriately used, as it was to Abraham the promise was made, "In thee" - "in thy seed shall all the nations of the earth be blessed" (Genesis 12:3; Genesis 22:18). The Septuagint reading, which the Vulgate follows, is, 'WITH the God of Abraham, for "the people of the God of Abraham' [ `am , for `im ]. The text is better.
For the shields of the earth belong unto God. The princes are metaphorically called "shields," as being the protectors of their people, (Hosea 4:18, margin.)