Psalms 52:9

9. Because thou hast done it Because thou hast done what I had hoped for, namely, overthrown the wicked and vindicated and upheld the righteous. This was cause of praise and rejoicing, as it is in all ages with all lovers of God and the well-being of society.

I will wait on thy name Parallel to, I trust in the mercy of God, Psalms 52:8. The “name” of God is often used for God himself; to “wait on” his “name,” is to wait for him, for the manifestation of his glory. It is good before thy saints That is, that men should “trust” and hope in God, and “wait” the unfolding of his plans and the rewards of his righteousness.