6 So Achish called David and said to him, “As surely as the LORD lives, you have been reliable, and I would be pleased to have you serve with me in the army. From the day you came to me until today, I have found no fault in you, but the rulers don’t approve of you.

Read 1 Samuel 29:6 Using Other Translations

Then Achish called David, and said unto him, Surely, as the LORD liveth, thou hast been upright, and thy going out and thy coming in with me in the host is good in my sight: for I have not found evil in thee since the day of thy coming unto me unto this day: nevertheless the lords favour thee not.
Then Achish called David and said to him, "As the LORD lives, you have been honest, and to me it seems right that you should march out and in with me in the campaign. For I have found nothing wrong in you from the day of your coming to me to this day. Nevertheless, the lords do not approve of you.
So Achish finally summoned David and said to him, “I swear by the LORD that you have been a trustworthy ally. I think you should go with me into battle, for I’ve never found a single flaw in you from the day you arrived until today. But the other Philistine rulers won’t hear of it.