281 Now in those days the Philistines got their forces together to make war on Israel. And Achish said to David, Certainly you and your men are to go out with me to the fight. 2 And David said to Achish, You will see now what your servant will do. And Achish said to David, Then I will make you keeper of my head for ever.
3 Now Samuel was dead, and all Israel, after weeping for him, had put his body in its last resting-place in Ramah, his town. And Saul had put away from the land all those who had control of spirits and who made use of secret arts. 4 And the Philistines came together and put their forces in position in Shunem; and Saul got all Israel together and they took up their positions in Gilboa.
Matthew Henry's Commentary on 1 Samuel 28:1-4
Commentary on 1 Samuel 28:1-6
(Read 1 Samuel 28:1-6)
David could not refuse Achish without danger. If he promised assistance, and then stood neuter, or went over to the Israelites, he would behave with ingratitude and treachery. If he fought against Israel, he would sin greatly. It seemed impossible that he should get out of this difficulty with a clear conscience; but his evasive answer, intended to gain time, was not consistent with the character of an Israelite indeed. Troubles are terrors to the children of disobedience. In his distress, Saul inquired of the Lord. He did not seek in faith, but with a double, unstable mind. Saul had put the law in force against those that had familiar spirits, Exodus 22:18. Many seem zealous against, sin, when they are any way hurt by it, who have no concern for the glory of God, nor any dislike of sin as sin. Many seem enemies to sin in others, while they indulge it in themselves. Saul will drive the devil out of his kingdom, yet harbours him in his heart by envy and malice. How foolish to consult those whom, according to God's law, he had endeavoured to root out!