Go, and the Lord be with thee - Saul saw that these were reasonable grounds of confidence, and therefore wished him success.

And David said moreover,.... For the further confirmation of it, and as more strongly expressing his faith of it; not as owing to any natural strength or skill of his, but to the power of God, of whose assistance he made no question:

the Lord that delivered me out of the paw of the lion, and out of the paw of the bear; for to him he ascribes his deliverance from those savage creatures, and his victory over them, and on him he relied for help and salvation in the present case:

he will deliver me out of the hand of this Philistine; David did not go forth in his own name and strength, but in the name and strength of the Lord of hosts:

and Saul; seeing him so positive, and fully assured of victory:

said unto David, go, and the Lord be with thee; to help and assist him, to deliver him out of the hand of the Philistine, and give him victory over him; the Targum is,"the Word of the Lord be for thy help.''

David said moreover, The LORD that delivered me out of the paw of the lion, and out of the paw of the bear, he will deliver me out of the hand of this Philistine. And Saul said unto David, {m} Go, and the LORD be with thee.

(m) For by these examples he saw that the power of God was with him.

17:37 The Lord, and c. - The lion and the bear were only enemies to me and my sheep, and it was in defence of them I attacked them. But this Philistine is an enemy to my God and his people, and it is for their honour that I attack him.

37. The Lord that delivered me-It would have been natural for a youth, and especially an Oriental youth, to make a parade of his gallantry. But David's piety sank all consideration of his own prowess and ascribed the success of those achievements to the divine aid, which he felt assured would not be withheld from him in a cause which so intimately concerned the safety and honor of His people.

Saul said unto David, Go, and the Lord be with thee-The pious language of the modest but valiant youth impressed the monarch's heart. He felt that it indicated the true military confidence for Israel, and, therefore, made up his mind, without any demur, to sanction a combat on which the fate of his kingdom depended, and with a champion supporting his interests apparently so unequal to the task.

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.