The sons of Jacob and Joseph— The people of the Jews are very properly styled the sons of Joseph, as well as of Jacob. For as Jacob was, under God, the author of their being; so was Joseph the preserver of it. The Chaldee paraphrast understood it thus; rendering it, The sons which Jacob begat and Joseph nourished. The allusion in this and the following verses, is to the deliverance of the Israelites from Egypt; and the plain inference is, that the same goodness and power may be expected to afford the same salvation in the present despondency and distress. See Bishop Lowth's 26th Prelection for a critique upon this psalm.
Related Commentaries of Psalms 77:15
Psalms 77:15
15 Thou hast with thine arm redeemed thy people, the sons of Jacob and Joseph. Selah.