1 Samuel 17:38-39

King James Version

³⁸ And Saul armed David with his armour, and he put an helmet of brass upon his head; also he armed him with a coat of mail.

³⁹ And David girded his sword upon his armour, and he assayed to go; for he had not proved it. And David said unto Saul, I cannot go with these; for I have not proved them. And David put them off him.