18 Then on the seventh day it came to pass that the child died. And the servants of David were afraid to tell him that the child was dead. For they said, "Indeed, while the child was alive, we spoke to him, and he would not heed our voice. How can we tell him that the child is dead? He may do some harm!" 19 When David saw that his servants were whispering, David perceived that the child was dead. Therefore David said to his servants, "Is the child dead?" And they said, "He is dead." 20 So David arose from the ground, washed and anointed himself, and changed his clothes; and he went into the house of the Lord and worshiped. Then he went to his own house; and when he requested, they set food before him, and he ate. 21 Then his servants said to him, "What is this that you have done? You fasted and wept for the child while he was alive, but when the child died, you arose and ate food." 22 And he said, "While the child was alive, I fasted and wept; for I said, 'Who can tell whether the Lord will be gracious to me, that 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 shall not return to me." 24 Then David comforted Bathsheba his wife, and went in to her and lay with her. So she bore a son, and he called his name Solomon. Now the Lord loved him, 25 and He sent word by the hand of Nathan the prophet: So he called his name Jedidiah, because of the Lord.
26 Now Joab fought against Rabbah of the people of Ammon, and took the royal city. 27 And Joab sent messengers to David, and said, "I have fought against Rabbah, and I have taken the city's water supply. 28 Now therefore, gather the rest of the people together and encamp against the city and take it, lest I take the city and it be called after my name." 29 So David gathered all the people together and went to Rabbah, fought against it, and took it. 30 Then he took their king's crown from his head. Its weight was a talent of gold, with precious stones. And it was set on David's head. Also he brought out the spoil of the city in great abundance. 31 And he brought out the people who were in it, and put them to work with saws and iron picks and iron axes, and made them cross over to the brick works. So he did to all the cities of the people of Ammon. 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.