Sing to the LORD, O you His saints, and praise His holy name.
David had flatted himself too confidently in his prosperity, and security bred carelessness that God rightly chastised. When Absalom's rebellion was crushed and David returned to his throne, he dedicated his house with thanksgiving, confessing both his former false confidence and God's faithful discipline toward him.
AI summary
Commenting on Psalm 30:1-12
Sing unto the Lord, O ye saints of his. "Join my song; assist me to express my gratitude." He felt that he could not praise God enough himself, and therefore he would enlist the hearts of others. Sing unto the Lord, O ye saints of his. David would not fill his choir with reprobates, but with sanctified persons, who could sing from their hearts.
It was the laudable practice of the pious Jews, and, though not expressly appointed, yet allowed and accepted, when they had built a new house, to dedicate it to God, Deu 20:5. David did so when his house was built, and he took possession of it (Sa2 5:11); for royal palaces do as much need God's protection, and are as much bound to be at his service, as ordinary houses.
Commenting on Psalm 30:1-5