Let them shout for joy - That is, Let me be delivered; let my friends see that God is on my side, and that they have occasion to rejoice in his merciful interposition in my behalf.
That favor my righteous cause - Margin, as in Hebrew, “my righteousness.” The reference is to those who considered his cause a just one, and who were his friends.
Yea, let them say continually - Let this be a constant subject of grateful reflection - a perpetual source of joy to them - that God has interposed in my behalf, and has shown that my cause was a just one.
Let the Lord be magnified - Be regarded as great, exalted, glorious. Let the effect be to elevate their conceptions of the character of God by the fact that he has thus interposed in a righteous cause, and has shown that he is the friend of the wronged and the oppressed.
Which hath pleasure in the prosperity of his servant - Who delights to make his friends prosperous and happy, Let them see that this is the character of God, and let them thus be led to rejoice in him evermore.