"“David went out whithersoever Saul sent him, and behaved himself wisely: and Saul set him over the men of war.” David was prudent and faithful, and it was evident that the blessing of God was with him. Saul at times realized his own unfitness for the government of Israel, and he felt that the kingdom would be more secure if there could be connected with him one who received instruction from the Lord. Saul hoped also that his connection with David would be a safeguard to himself. Since David was favored and shielded by the Lord, his presence might be a protection to Saul when he went out with him to war. PP 649.2"
"And David went out whithersoever Saul sent him, and behaved himself wisely: and Saul set him over the men of war, and he was accepted in the sight of all the people, and also in the sight of Saul’s servants."
The EGW passage directly quotes 1 Samuel 18:5 and provides commentary on the events described. The direct quotation and surrounding context make it an explicit allusion.