Psalms 1:1 Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful.
[Patriarchs & Prophets pp 672>673] The Philistines had feared David more than they had feared Saul and his armies; and by placing himself under the protection of the Philistines, David discovered to them the weakness of his own people. Thus he encouraged these relentless foes to oppress Israel. David had been anointed to stand in defense of the people of God. And the Lord would not have His servants give encouragement to the wicked by disclosing the weakness of His people or by an appearance of indifference to their welfare.
Furthermore, the impression was received by his brethren that he had gone to the heathen to serve their gods. By this act he gave occasion for misconstruing his motives, and many were led to hold prejudice against him. The very thing that Satan desired to have him do he was led to do; for, in seeking refuge among the Philistines, David caused great exultation to the enemies of God and His people. David did not renounce his worship of God nor cease his devotion to His cause.
But he sacrificed his trust in Him to his personal safety, and thus tarnished the upright and faithful character that God requires His servants to possess. David was cordially received by the king of the Philistines. The warmth of this reception was partly due to the fact that the king admired him and partly to the fact that it was flattering to his vanity to have a Hebrew seek his protection.
1st Samuel 27:3 And David dwelt with Achish at Gath, he and his men, every man with his household, even David with his two wives, Ahinoam the Jezreelitess, and Abigail the Carmelitess, Nabal's wife.
May God add His blessing to the study of His word. “Good night” and God bless!