And they were helped against them, and the Hagrites and all who [were] with them were given into their hand, for they cried out to God in the battle, and he responded to their prayer because they trusted in him.

And David went forth to meet them, and responded, and said to them, If, peaceably, ye are come unto me, to help me, I shall have towards you, a heart for unity, - but, if to betray me to mine adversaries, there being no violence in my hands, may the God of our fathers see and rebuke!

David responded to God, "I sinned greatly by behaving this way. But now I am asking you, please remove the guilt of your servant, since I have acted very foolishly."

So the LORD responded through Gad, David's seer.

David built there an altar to the Lord and offered burnt sacrifices and peace offerings. He called out to the Lord, and the Lord responded by sending fire from the sky and consuming the burnt sacrifice on the altar.

At that time, when David saw that the Lord responded to him at the threshing floor of Ornan the Jebusite, he sacrificed there.