18 On the seventh day the child died. And the servants of David were afraid to tell him that the child was dead; for they said, "While the child was still alive, we spoke to him, and he did not listen to us; how then can we tell him the child is dead? He may do himself some harm." 19 But when David saw that his servants were whispering together, he perceived that the child was dead; and David said to his servants, "Is the child dead?" They said, "He is dead." 20 Then David rose from the ground, washed, anointed himself, and changed his clothes. He went into the house of the Lord, and worshiped; he then went to his own house; and when he asked, they set food before him and he ate. 21 Then his servants said to him, "What is this thing that you have done? You fasted and wept for the child while it was alive; but when the child died, you rose and ate food." 22 He said, "While the child was still alive, I fasted and wept; for I said, "Who knows? The Lord may be gracious to me, and the child may live.' 23 But now he is dead; why should I fast? Can I bring him back again? I shall go to him, but he will not return to me." 24 Then David consoled his wife Bathsheba, and went to her, and lay with her; and she bore a son, and he named him Solomon. The Lord loved him, 25 and sent a message by the prophet Nathan; so he named him Jedidiah, because of the Lord.
26 Now Joab fought against Rabbah of the Ammonites, and took the royal city. 27 Joab sent messengers to David, and said, "I have fought against Rabbah; moreover, I have taken the water city. 28 Now, then, gather the rest of the people together, and encamp against the city, and take it; or I myself will take the city, and it will be called by my name." 29 So David gathered all the people together and went to Rabbah, and fought against it and took it. 30 He took the crown of Milcom from his head; the weight of it was a talent of gold, and in it was a precious stone; and it was placed on David's head. He also brought forth the spoil of the city, a very great amount. 31 He brought out the people who were in it, and set them to work with saws and iron picks and iron axes, or sent them to the brickworks. Thus he did to all the cities of the Ammonites. Then David and all the people returned to Jerusalem.
Matthew Henry's Commentary on 2 Samuel 12:18-33
Commentary on 2 Samuel 12:15-25
(Read 2 Samuel 12:15-25)
David now penned the 51st Psalm, in which, though he had been assured that his sin was pardoned, he prays earnestly for pardon, and greatly laments his sin. He was willing to bear the shame of it, to have it ever before him, to be continually upbraided with it. God gives us leave to be earnest with him in prayer for particular blessings, from trust in his power and general mercy, though we have no particular promise to build upon. David patiently submitted to the will of God in the death of one child, and God made up the loss to his advantage, in the birth of another. The way to have creature comforts continued or restored, or the loss made up some other way, is cheerfully to resign them to God. God, by his grace, particularly owned and favoured that son, and ordered him to be called Jedidiah, Beloved of the Lord. Our prayers for our children are graciously and as fully answered when some of them die in their infancy, for they are well taken care of, and when others live, "beloved of the Lord."
Commentary on 2 Samuel 12:26-31
(Read 2 Samuel 12:26-31)
To be thus severe in putting the children of Ammon to slavery was a sign that David's heart was not yet made soft by repentance, at the time when this took place. We shall be most compassionate, kind, and forgiving to others, when we most feel our need of the Lord's forgiving love, and taste the sweetness of it in our own souls.