2 Samuel 12:20-23

20Then David got up from the floor, washed and anointed himself, and changed his clothes. Then he went to the House of Adonai and worshipped. When he came back to his own palace, he asked for food, so they set food before him and he ate.

21His servants asked him, “What is this thing you have done? You fasted and wept while the child was still alive, but as soon as the child died, you got up and ate food.”

22He replied, “While the child was yet alive, I fasted and wept, for I thought, ‘Who knows? Adonai might be gracious to me and let the child live.’

23But now that he has died, why should I fast? Can I bring him back again? It is I who will be going to him, but he will never return to me.”