Charles H. Spurgeon on Psalms 77:15

The sons of Jacob and Joseph. The distinction between the sons of Jacob and Joseph is not meaningless. For by the sons of Jacob or Israel the believing Jews are properly intended, those that trace their descent to him not only according to the flesh but according to faith. Of whom although Joseph was one, yet since he was sold by his brethren and after many sufferings among foreign tribes raised to high rank, it is highly congruous to distinguish him from the sons of Jacob, and he is fitly regarded as a prince of the Gentiles apart from Jacob's sons, who sold him. Gerhohus.