9 And Achish answereth and saith unto David, 'I have known that thou 'art' good in mine eyes as a messenger of God; only, the princes of the Philistines have said, He doth not go up with us into battle;

Matthew Henry's Commentary on 1 Samuel 29:9

Commentary on 1 Samuel 29:6-11

(Read 1 Samuel 29:6-11)

David scarcely ever had a greater deliverance than when dismissed from such insnaring service. God's people should always behave themselves so, as, if possible, to get the good word of all they have dealings with: and it is due to those who have acted well, to speak well of them.