David went out wherever Saul sent him, [and] behaved himself wisely: and Saul set him over the men of war, and it was good in the sight of all the people, and also in the sight of Saul's servants.
Saul may or may not have known at this time that Samuel had anointed David. His growing jealousy seems to have mounted as a result of David’s increasing ability, success, and popularity with the people that stemmed from God’s help (grace).