2 Samuel 12:21-23

21Then his servants said to him, “What is this thing that you have done? While the child was alive you fasted and wept, but when the child died, you got up and ate food.”

22David said, “While the child was still alive, I fasted and wept; for I thought, ‘Who knows, the Lord may be gracious to me and the child may live.’

23But now he is dead; why should I [continue to] fast? Can I bring him back again? I will go to him [when I die], but he will not return to me.”