Then said Abishai to David, God has delivered up your enemy into your hand this day: now therefore please let me strike him with the spear to the earth at one stroke, and I will not strike him the second time.
This was not a time of great spiritual profit for David. His previous experiences, when he was hunted by Saul in the Judean wilderness, spiritually enriched him and produced many of his psalms. By contrast, his time in Philistia was often characterized by shameful behaviour and, so far as we know, produced no psalms.David pleased Achish and enriched his people by carrying out successful raids that Achish thought were against the Israelites or peoples friendly to the Israelites. But David lied to Achish, for the raids were against other peoples, usually those hostile to the Israelites. To his shame David directed his men to slaughter all the inhabitants of the towns he raided. In this way he made sure that no one was left to tell Achish the true story about which people David had plundered (8-12).