Once for all I have sworn by my holiness; I will not lie to David.
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
Once have I sworn by my holiness that I will not lie unto David. Because he could swear by no greater he swore by himself, and by that peculiar attribute which is his highest glory, being the subject of threefold adoration by all the hosts of heaven. God here pledges the crown of his kingdom, the excellent beauty of his person, the essence of his nature.
The covenant God made with David and his seed was mentioned before (Psa 89:3, Psa 89:4); but in these verses it is enlarged upon, and pleaded with God, for favour to the royal family, now almost sunk and ruined; yet certainly it looks at Christ, and has its accomplishment in him much more than in David; nay, some passages here are scarcely applicable at all...
Commenting on Psalm 89:19-37