1 Peter 2:12

Have your behavior comely, among the Gentiles, that, whereas, they speak against you, as evil doers, having beheld your good works, they may glorify God, in the day of visitation.

1 Peter 3:16

Hold fast a good conscience, that, whereas they speak against you as evil doers, they may be put to shame who arraign your good behavior in Christ.

Treasury of Scripture Knowledge

Summary

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.

Bible References

Thou hast

1 Peter 2:12
Have your behavior comely, among the Gentiles, that, whereas, they speak against you, as evil doers, having beheld your good works, they may glorify God, in the day of visitation.
1 Peter 3:16
Hold fast a good conscience, that, whereas they speak against you as evil doers, they may be put to shame who arraign your good behavior in Christ.