1 Samuel 17:28

17:28 When David’s oldest brother Eliab heard him speaking to the men, he became angry with David and said, “Why have you come down here? To whom did you entrust those few sheep in the desert? I am familiar with your pride and deceit! You have come down here to watch the battle!”

1 Samuel 29:4

29:4 But the leaders of the Philistines became angry with him and said to him, “Send the man back! Let him return to the place that you assigned him! Don’t let him go down with us into the battle, for he might become our adversary in the battle. What better way to please his lord than with the heads of these men?