Thy servant slew both the lion and the bear,.... At different times, and several of them at one time or another; whenever any of them came into the flock, he used to lay hold on them and kill them, with all the ease imaginable. The Jews suppose this phrase denotes many of them (h).

And this uncircumcised Philistine shall be as one of them; as he was like them in nature, savage, cruel and unclean, so he would be in his end, killed as they; of this David was fully persuaded and assured in mind having an impulse from the Spirit of God, by which he was certified of it:

seeing he hath defied the armies of the living God; so that as he justly deserved to die, he made no doubt of it it would be his case.

(h) See Halicot Olam, p. 177.

"Thy servant slew both the lion and the bear; and the Philistine, this uncircumcised one, shall become like one of them (i.e., the same thing shall happen to him as to the lion and the bear), because he has defied the ranks of the living God." "And," he continued (1 Samuel 17:37), "the Lord who delivered me out of the hand (the power) of the lion and the bear, he will deliver me out of the hand of this Philistine." David's courage rested, therefore, upon his confident belief that the living God would not let His people be defied by the heathen with impunity. Saul then desired for him the help of the Lord in carrying out his resolution, and bade him put on his own armour-clothes, and bird on his armour. מדּיו (his clothes) signifies probably a peculiar kind of clothes which were worn under the armour, a kind of armour-coat to which the sword was fastened.

Thy servant slew both the lion and the bear: and this uncircumcised Philistine shall be as one of them, seeing he hath defied the armies of the living God.

17:31-39 A shepherd lad, come the same morning from keeping sheep, had more courage than all the mighty men of Israel. Thus God often sends good words to his Israel, and does great things for them, by the weak and foolish things of the world. As he had answered his brother's passion with meekness, so David answered Saul's fear with faith. When David kept sheep, he proved himself very careful and tender of his flock. This reminds us of Christ, the good Shepherd, who not only ventured, but laid down his life for the sheep. Our experience ought to encourage us to trust in God, and be bold in the way of duty. He that has delivered, does and will continue to do so. David gained leave to fight the Philistine. Not being used to such armour as Saul put upon him, he was not satisfied to go in that manner; this was from the Lord, that it might more plainly appear he fought and conquered in faith, and that the victory was from Him who works by the feeblest and most despised means and instruments. It is not to be inquired how excellent any thing is, but how proper. Let Saul's coat be ever so rich, and his armour ever so strong, what is David the better if they fit him not? But faith, prayer, truth, and righteousness; the whole armour of God, and the mind that was in Christ; are equally needful for all the servants of the Lord, whatever may be their work.