Psalm 141:3

And David said to Ahimelech the priest, “The king has commanded me with a matter and has said to me, ‘Let no one know anything about the matter on which I am sending you and with which I have commanded you; and I have directed the young men to a certain place.’

Guard your tongue from evil And your lips from speaking deceit.

For the choir director. For Jeduthun. A Psalm of David. I said, “I will keep watch over my ways That I may not sin with my tongue; I will keep watch over my mouth as with a muzzle While the wicked are in my presence.”

If anyone thinks himself to be religious while not bridling his tongue but deceiving his own heart, this man’s religion is worthless.