2 Samuel 22:27 KJV

With the pure thou wilt shew thyself pure; and with the froward thou wilt shew thyself unsavoury.
2 Samuel 22:27, King James Version

In context

26 With the merciful thou wilt shew thyself merciful, and with the upright man thou wilt shew thyself upright.

27 With the pure thou wilt shew thyself pure; and with the froward thou wilt shew thyself unsavoury.

28 And the afflicted people thou wilt save: but thine eyes are upon the haughty, that thou mayest bring them down.