1 Samuel 17:44,45

Come to me, and I will give thy flesh unto the fowls of the air It will be a tender and delicate feast for them. With such confidence did he presume on his success! Thus the security and presumption of fools destroy them. Then said David, I come to thee in the name, &c. By a commission from Him who commands all creatures in heaven and earth, and who has called me to, and animated me for, this undertaking. I rely on him as thou dost on thy sword and spear.