Sacrifice a thank offering to God, and fulfill your vows to the Most High.
PSALM 50 There have always been hypocrites in the Church, men who have placed religion in a mere observance of outward ceremonies, and among the Jews there were many who turned their attention entirely to the figures of the Law, without regarding the truth which was represented under them. They conceived that nothing more was demanded of them but their sacrifices and other rites.
Commenting on Psalm 50:1-23
The address which follows is directed to the professed people of God. It is clearly, in the first place, meant for Israel; but is equally applicable to the visible church of God in every age. It declares the futility of external worship when spiritual faith is absent, and the mere outward ceremonial is rested in.
Commenting on Psalm 50:7
Offer unto God thanksgiving. No longer look at your sacrifices as in themselves gifts pleasing to me, but present them as the tributes of your gratitude; it is then that I will accept them, but not while your poor souls have no love and no thankfulness to offer me.