Psalms 18:26

With the pure thou wilt shew thyself pure; and with the froward thou wilt shew thyself froward.
— Psalms 18:26, King James Version

In other translations

World English Bible (WEB)

With the pure, you will show yourself pure. With the crooked you will show yourself shrewd.

American Standard Version (ASV)

With the pure thou wilt show thyself pure; And with the perverse thou wilt show thyself froward.

Young's Literal Translation (YLT)

With the pure Thou showest Thyself pure, And with the perverse showest Thyself a wrestler,