1 Samuel 28:2

And David saith unto Achish, 'Therefore -- thou dost know that which thy servant dost do.' And Achish saith unto David, 'Therefore -- keeper of my head I do appoint thee all the days.'

1 Samuel 27:10

And Achish saith, 'Whither have ye pushed to-day?' and David saith, 'Against the south of Judah, and against the south of the Jerahmeelite, and unto the south of the Kenite.'

2 Samuel 16:16-19

and it cometh to pass, when Hushai the Archite, David's friend, hath come unto Absalom, that Hushai saith unto Absalom, 'Let the king live! let the king live!'

Romans 12:9

The love unfeigned: abhorring the evil; cleaving to the 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 saith, 'Whither have ye pushed to-day?' and David saith, 'Against the south of Judah, and against the south of the Jerahmeelite, and unto the south of the Kenite.'
2 Samuel 16:16
and it cometh to pass, when Hushai the Archite, David's friend, hath come unto Absalom, that Hushai saith unto Absalom, 'Let the king live! let the king live!'
Romans 12:9
The love unfeigned: abhorring the evil; cleaving to the good;