Longer Catechism (Orthodox) 26.601

Chapter 26 — Part III — The Ten Commandments

Section 601. Q. If we would avoid sins against the ninth commandment, what rule must we follow? A. We must bridle our tongue. He that will love life, and see good days, let him refrain his tongue from evil, and his lips that they speak, no guile. 1 Pet. iii. 10. If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion is vain. James i. 26.