1 Samuel 17:39

And David girded his, sword upon his armour,.... Which Saul also perhaps furnished him with:

and he assayed to go; made an attempt, and had a mind to go thus accoutred; he at first showed an inclination to go in such an habit, but afterwards would not:

for he had not proved [it]; as warriors were wont to do; so Achilles did i; he never made trial of such armour before, he had not been used to it, and knew not how to behave in it, or walk with it on him; it was an encumbrance to him: Abarbinel renders it, "but he had not proved [it]"; he would have gone with it but for that reason; the Targum is,

"because there was no miracle in them;''

because if he had made use of this, there would have been no appearance of a miracle in getting the victory over the Philistine, as was by using only a sling and stones:

and David said unto Saul, I cannot go with these, for I have not proved [them]; he thought fit to acquaint Saul with it that he could not go thus accoutred, and his reason for it, lest he should be offended with him:

and David put them off him; took off the helmet from his head, ungirt the sword upon his armour, and stripped himself of his coat of mail, and went forth entirely unarmed.

i Homer. Iliad. 19. ver. 384, 385. so Theocrit. Idyll. 10. ver. 61.