C. F. Keil and Franz Delitzsch on 2 Samuel 12:19-20

2Sa 12:19-20

David saw at once what had happened from their whispering conversation, and asked whether the child was dead. When they answered in the affirmative, he rose up from the ground, washed and anointed himself, and changed his clothes; that is to say, he laid aside all the signs of penitential grief and mourning, went into the house of the Lord (the holy tent upon Mount Zion) and worshipped, and then returned to his house, and had food set before him.