1 Samuel 28:2

And David said to Achish, Surely you shall know what your servant can do. And Achish said to David, And I will make you keeper of my head forever.

1 Samuel 27:10

And Achish said, Where have you made a raid today? 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 happened, when Hushai the Archite, David's friend, had come to Absalom, Hushai said to Absalom, Let the king live, let the king live!

Romans 12:9

Let love be without hypocrisy, shrinking from evil, cleaving to 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, Where have you made a raid today? 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 happened, when Hushai the Archite, David's friend, had come to Absalom, Hushai said to Absalom, Let the king live, let the king live!
Romans 12:9
Let love be without hypocrisy, shrinking from evil, cleaving to good;