Titus 2:1

But speak thou the things which become sound doctrine:
— Titus 2:1, King James Version

In other translations

World English Bible (WEB)

But say the things which fit the sound doctrine,

American Standard Version (ASV)

But speak thou the things which befit the sound doctrine:

Young's Literal Translation (YLT)

And thou--be speaking what doth become the sound teaching;