In 1 Samuel 29:4, the Philistine commanders express concern that David might turn against them in battle. This echoes the situation in 1 Samuel 14:21, where Hebrews who had previously sided with the Philistines turned back to join Saul and Jonathan.
Achish's trust in David, as seen in 1 Samuel 29:6, is built on David's previous actions described in 1 Samuel 27:12, where Achish believed David had made himself odious to Israel.
Achish's high regard for David in 1 Samuel 29:9 is reminiscent of Saul's fear and respect for David in 1 Samuel 18:12-15, where David's success and favor with God made him esteemed in the eyes of others.
David's departure from the Philistine camp in 1 Samuel 29:11 sets the stage for the events in 1 Samuel 30:1, where David returns to Ziklag to find it raided by the Amalekites.