1 Samuel 18:5

David went out. I.e. went on military expeditions. As the verb has thus a technical signification, it makes a complete sense, and the verse should be translated, "And David went forth ( i.e. on warlike enterprises); whithersoever Saul sent him he prospered, and Saul set him over the men of war." These expeditions were not upon a very large scale; for it is not until 1 Samuel 18:13 that we read of David being made "captain over a thousand." Still, even while only a centurion in rank, yet, as being in constant attendance upon the king, he would often temporarily have the command of larger bodies of men, or would go on campaigns as one of the king's officers. As it is mentioned that his promotion caused no envy because of his great merits, it follows that it was rapid enough to have given occasion to ill will under ordinary circumstances. Behaved himself wisely. This is the primary meaning of the verb; but as success is the result of wise conduct, it constantly signifies to prosper. This verse is a summary of events which may have occupied a very considerable space of time. It was only gradually that David's fame became so great as to rouse all the worst feelings in Saul's mind.

SAUL 'S HATRED OF DAVID ( 1 Samuel 18:6-16 ).