1 Samuel 17:39

Y ciñó David su espada sobre sus vestidos, y probó á andar, porque nunca había probado. Y dijo David á Saúl: Yo no puedo andar con esto, porque nunca lo practiqué. Y echando de sí David aquellas cosas,

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.