The froward tongue shall be cut out - This probably alludes to the punishment of cutting out the tongue for blasphemy, treasonable speeches, profane swearing, or such like. The tunge of schrewis schal perishen. - Old MS. Bible. Were the tongue of every shrew or scold to be extracted, we should soon have much less noise in the world.

mouth

Proverbs 10:11,13,20,21 The mouth of a righteous man is a well of life: but violence covers the mouth of the wicked...

Psalm 37:30 The mouth of the righteous speaks wisdom, and his tongue talks of judgment.

the froward

Psalm 31:18 Let the lying lips be put to silence; which speak grievous things proudly and contemptuously against the righteous.

Psalm 63:11 But the king shall rejoice in God; every one that swears by him shall glory: but the mouth of them that speak lies shall be stopped.

Psalm 120:3,4 What shall be given to you? or what shall be done to you, you false tongue...

Sanctions of Moral Law, Natural and Governmental.
In the discussion of this subject, I shall show-- I. What constitute the sanctions of law. 1. The sanctions of law are the motives to obedience, the natural and the governmental consequences or results of obedience and of disobedience. 2. They are remuneratory, that is, they promise reward to obedience. 3. They are vindicatory, that is, they threaten the disobedient with punishment. 4. They are natural, that is, happiness is to some extent naturally connected with, and the necessary consequence of, …
Charles Grandison Finney—Systematic Theology

How the Simple and the Crafty are to be Admonished.
(Admonition 12.) Differently to be admonished are the simple and the insincere. The simple are to be praised for studying never to say what is false, but to be admonished to know how sometimes to be silent about what is true. For, as falsehood has always harmed him that speaks it, so sometimes the hearing of truth has done harm to some. Wherefore the Lord before His disciples, tempering His speech with silence, says, I have many things to say unto you, but ye cannot bear them now (Joh. xvi. 12). …
Leo the Great—Writings of Leo the Great

Letter xv (Circa A. D. 1129) to Alvisus, Abbot of Anchin
To Alvisus, Abbot of Anchin He praises the fatherly gentleness of Alvisus towards Godwin. He excuses himself, and asks pardon for having admitted him. To Alvisus, Abbot of Anchin. [18] 1. May God render to you the same mercy which you have shown towards your holy son Godwin. I know that at the news of his death you showed yourself unmindful of old complaints, and remembering only your friendship for him, behaved with kindness, not resentment, and putting aside the character of judge, showed yourself …
Saint Bernard of Clairvaux—Some Letters of Saint Bernard, Abbot of Clairvaux