Contradiction with Psalm 31:18
Unlike Proverbs 12:19, this verse suggests the silence of lying lips, implying they do not continue forever.
Psalm 31:18: Let the lying lips be put to silence; which speak grievous things proudly and contemptuously against the righteous. [grievous...: Heb. a hard thing]
Contradiction with Psalm 52:4-5
This verse contrasts Proverbs 12:19 by highlighting that deceitful tongues will be destroyed, not allowed to continue forever.
Psalm 52:4-5: Thou lovest all devouring words, O [thou] deceitful tongue. [O thou...: or, and the deceitful tongue]
Contradiction with Jeremiah 9:5
Whereas Proverbs 12:19 talks about the enduring truth, this verse depicts deceit as increasing and enduring among people.
Jeremiah 9:5: And they will deceive every one his neighbour, and will not speak the truth: they have taught their tongue to speak lies, [and] weary themselves to commit iniquity. [deceive: or, mock]
Contradiction with Ezekiel 13:22
This verse contradicts Proverbs 12:19 by describing the effect of lies as bringing distress and falsehood strengthening the wicked.
Ezekiel 13:22: Because with lies ye have made the heart of the righteous sad, whom I have not made sad; and strengthened the hands of the wicked, that he should not return from his wicked way, by promising him life: [by...: or, that I should save his life: Heb. by quickening him]
Contradiction with James 3:6
This verse suggests the destructive nature of the tongue, which contradicts the idea of enduring truth leading to stability.
James 3:6: And the tongue [is] a fire, a world of iniquity: so is the tongue among our members, that it defileth the whole body, and setteth on fire the course of nature; and it is set on fire of hell. [course: Gr. wheel]