1 Samuel 17:39 (KJV)
And David girded his sword upon his armor, and he attempted 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.
And David girded his sword upon his armor, and he attempted 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.