Do you know why God wants to do revenge and not us? 1 Samuel 21-25

1 Samuel 25:39 (NASBStr)

 When David heard that Nabal was dead, he said, “Blessed be the Lord, who has pleaded the cause of my reproach from the hand of Nabal and has kept back His servant from evil. The Lord has also returned the evildoing of Nabal on his own head.” Then David sent a proposal to Abigail, to take her as his wife.

The story of David, Nabal and his wife, Abigail, is a great story to emphasize Paul's teaching in Romans 12:18,19.   In that New Testament book Paul is telling the Roman believers that since they have been justified by grace through faith they should not seek vengeance on others, but they should trust in God and allow God do vengeance.   Note the Romans passage:

Romans 12:18-21 (NASBStr)

If possible, so far as it depends on you, be at peace with all men. Never take your own revenge, beloved, but leave room for the wrath of God, for it is written, “ Vengeance is Mine, I will repay,” says the Lord. “ But if your enemy is hungry, feed him, and if he is thirsty, give him A drink; for in so doing you will heap burning coals on his head.” Do not be overcome by evil, but overcome evil with good.

When Nabel, was a wicked man, rejected David's offering for peace and David's request for food and supplies, David had purposed in his heart to kill the man.   David's reaction was not Biblical.  He was reacting as any ungodly man might act.   When Nabel's wife hears of her husband's rejection of David's offer, she quickly gathers supplies and takes them to David, intervening on behalf of her husband.   David recognizes this and repents of his evil intent, while at the same time thanking Abigail for being God's messenger and preventing him from doing something he would later regret (God often sends us such messengers, but we don't always see them or listen to them).  When Nabel hears of Abigail's intervention, however, he dies of a heart attack.   This is where the above verse comes into play and how it mixes with the Romans' passage.   When David backed away and let God work, simply trying to live at peace with a man who would not listen, God brought about justice and vengeance.   David, in God's grace, ends up marrying Abigail.   This is the ultimate justice.  David married the wife of the man who had done him wrong.   Is there any sweeter revenge?   God orchestrated all of this to show us if we allow God to work great things will happen.    We should not try to work our own justice.