You have said, “I have made a covenant with my chosen one; I have sworn to David my servant:
PSALM 89 The prophet who wrote this psalm, whoever he was, in approaching the throne of grace to make supplication to God in behalf of the afflicted Church, lays down, as an encouragement both to himself and the rest of the faithful to cherish good hope, the covenant which God had made with David.
Commenting on Psalm 89:1-52
I have made a covenant with my chosen, I have sworn unto David my servant. This was the ground of the Psalmist's confidence in God's mercy and truth, for he knew that the Lord had made a covenant of grace with David and his seed, and confirmed it by an oath.
The psalmist has a very sad complaint to make of the deplorable condition of the family of David at this time, and yet he begins the psalm with songs of praise; for we must, in every thing, in every state, give thanks; thus we must glorify the Lord in the fire.
Commenting on Psalm 89:1-4