1 Samuel 12:22; 1 Samuel 17:39

22 For the LORD will not forsake his people for his great name's sake: because it hath pleased the LORD to make you his people.

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.