And as the ark of the LORD came into the city of David, Michal Saul's daughter looked through a window, and saw king David leaping and dancing before the LORD; and she despised him in her heart.
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Ambrose of Milan
AD 397
But we also find praiseworthy bodily dancing in honor of God, for David danced before the ark of the Lord. Michal, however, the daughter of Saul, saw him dancing and beating a drum in the presence of the Lord and asked him, after receiving him into her home, “How is it honorable for the king of Israel to dance naked today in the presence of his maidservants?” And David answered Michal in the presence of the Lord: “Blessed be the Lord who chose me above your father and above his entire house to be established as prince over his people Israel. I will make merry in the presence of the Lord and run naked, and I will be lighthearted in your presence, and I will be honored by the maids with whom you called me naked.” “And Michal,” it says, “the daughter of Saul, had no children until the day she died.” Thus, this is a clear lesson that the prophet who beats a drum and dances before the ark of the Lord is justified, whereas the one who reproves him is condemned to sterility. - "Exposition on ...
Leaping. Septuagint, "beating "musical instruments. She counted him as nothing (Haydock)
She rather partook of her father's disposition and pride. (Menochius)