1 Samuel 28:2

And David said to Achish, Therefore thou shalt know what thy servant will do. And Achish said to David, Therefore will I make thee keeper of my head for ever.

1 Samuel 27:10

And Achish said, Against whom have ye made a raid to-day? And David said, Against the South of Judah, and against the South of the Jerahmeelites, and against the South of the Kenites.

2 Samuel 16:16-19

And it came to pass, when Hushai the Archite, David's friend, was come unto Absalom, that Hushai said unto Absalom, Long live the king, Long live the king.

Romans 12:9

Let love be without hypocrisy. Abhor that which is evil; cleave to that which is good.

Treasury of Scripture Knowledge

Summary

And David said to Achish, Surely thou shalt know what thy servant can do. And Achish said to David, Therefore will I make thee keeper of mine head for ever.

Bible References

Surely

1 Samuel 27:10
And Achish said, Against whom have ye made a raid to-day? And David said, Against the South of Judah, and against the South of the Jerahmeelites, and against the South of the Kenites.
2 Samuel 16:16
And it came to pass, when Hushai the Archite, David's friend, was come unto Absalom, that Hushai said unto Absalom, Long live the king, Long live the king.
Romans 12:9
Let love be without hypocrisy. Abhor that which is evil; cleave to that which is good.

American Standard Version Public Domain