What did David do when he learned that his baby son had died?

Answer: Washed, worshiped, and ate

David said, "Now that he is dead, why should I fast? Can I bring him back again? I will go to him, but he will not return to me."

“Then David got up from the ground, washed and anointed himself, changed his clothes, and went into the house of the LORD and worshiped. Then he went to his own house, and at his request they set food before him, and he ate.”— 2 Samuel 12:20 (BSB)