Wisdom 1:11

11 Beware then of useless murmuring, and keep your tongue from slander; because no secret word is without result, and a lying mouth destroys the soul.

Wisdom 1:11 In-Context

9 For inquiry will be made into the counsels of an ungodly man, and a report of his words will come to the Lord, to convict him of his lawless deeds;
10 because a jealous ear hears all things, and the sound of murmurings does not go unheard.
11 Beware then of useless murmuring, and keep your tongue from slander; because no secret word is without result, and a lying mouth destroys the soul.
12 Do not invite death by the error of your life, nor bring on destruction by the works of your hands;
13 because God did not make death, and he does not delight in the death of the living.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.