I Samuel 17:27-29

And the people answered him in this manner, saying, “So shall it be done for the man who kills him.” Now Eliab his oldest brother heard when he spoke to the men; and Eliab’s anger was aroused against David, and he said, “Why did you come down here? And with whom have you left those few sheep in the wilderness? I know your pride and the insolence of your heart, for you have come down to see the battle.” And David said, “What have I done now? Is there not a cause?”