You have with your arm redeemed your people, the sons of Jacob and Joseph. Selah.
Read Chapter 77
Augustine of Hippo
AD 430
16. "Thou hast redeemed in Thine arm Thy people" (ver. 15). "With Thine arm," that is, with Thy power. "And to whom hath the arm of the Lord been revealed?" "Thou hast redeemed in Thine arm Thy people, the sons of Israel and of Joseph." How as if two peoples, "the sons of Israel and of Joseph"? Are not the sons of Joseph among the sons of Israel? ...He hath admonished us of some distinction to be made. Let us search out our spirit, perchance God hath placed there something-God whom we ought even by night to seek with our hands, in order that we may not be deceived-perchance we shall discover even ourselves in this distinction of "sons of Israel and of Joseph." By Joseph He hath willed another people to be understood, hath willed that the people of the Gentiles be understood. Why the people of the Gentiles by Joseph? Because Joseph was sold into Egypt by his brethren. That Joseph whom the brethren envied, and sold him into Egypt, when sold into Egypt, toiled, was humbled; when made know...