Luke.11.35  Therefore be careful lest the light in you be darkness.
Titus.3.8  The saying is sure. I desire you to insist on these things, so that those who have believed in God may be careful to apply themselves to good deeds; these are excellent and profitable to men.

Hyper-concordance v1.1, by Sean Boisen. Scripture verses taken from the Revised Standard Version, copyright 1952, 1971.