Charles Ellicott Commentary 2 Samuel 6:21

"And David said unto Michal, [It was] before Jehovah, who chose me above thy father, and above all his house, to appoint me prince over the people of Jehovah, over Israel: therefore will I play before Jehovah." — 2 Samuel 6:21 (ASV)

Therefore will I play. —Rather, have I danced. (See 2 Samuel 6:5.)

Before the Lord. —David first gives the true and sufficient reason for his conduct—what he had done was before the Lord, in honouring whom no one can be truly humbled; and then he turns with a reproof to Michal, which should have shown her the utter unworthiness of her objections. God had set aside her father and his house for this very spirit of pride in which she was now indulging, and had chosen him instead.