Wisdom of Solomon 1:11
6 For wisdom is a kindly spirit, but will not free blasphemers from the guilt of their words; because God is witness of their inmost feelings, and a true observer of their hearts, and a hearer of their tongues. 7 Because the spirit of the Lord has filled the world, and that which holds all things together knows what is said, 8 therefore those who utter unrighteous things will not escape notice, and justice, when it punishes, will not pass them by. 9 For inquiry will be made into the counsels of the ungodly, and a report of their words will come to the Lord, to convict them of their lawless deeds; 10 because a jealous ear hears all things, and the sound of grumbling does not go unheard. 11 Beware then of useless grumbling, and keep your tongue from slander; because no secret word is without result, a and a lying mouth destroys the soul. 12 Do not invite death by the error of your life, or bring on destruction by the works of your hands;
Athanasius Defense Against the Arians 3
Since, however, after all his severe sufferings, after his retirement into Gaul, after his sojourn in a foreign and far distant country in the place of his own, after his narrow escape from death through their calumnies, but thanks to the clemency of the Emperor, — distress which would have satisfied even the most cruel enemy — they are still insensible to shame, are again acting insolently against the Church and Athanasius; and from indignation at his deliverance venture on still more atrocious schemes against him, and are ready with an accusation, fearless of the words in holy Scripture;, 'A false witness shall not be unpunished;' and, 'The mouth that belies slays the soul;' we therefore are unable longer to hold our peace, being amazed at their wickedness and at the insatiable love of contention displayed in their intrigues. For see, they cease not to disturb the ear of royalty with fresh reports against us; they cease not to write letters of deadly import, for the destruction of the Bishop who is the enemy of their impiety.
Notes and References
"... For many Christian authorities the criterion for a book’s inclusion in the canon depended not on the language of composition, but on whether it was normative and authoritative for doctrine and public reading. Yet books that fell outside this category could still be canonical at a lower level, and used for private reading among Christians (compare Tertullian, Cult. fem. 1.3: Gallagher 2012: 20–1), and so were certainly not banned or ignored. Even Athanasius of Alexandria, whose festal letter of 367 ce is often held to demarcate a Christian canon, notes that though certain books are not canonical (οὐ κανονιζόμενα μέν), they were authorized by tradition (τετυπωμένα δὲ παρὰ τῶν πατέρων) for reading to recent converts. For Athanasius these works included Wisdom of Solomon, Sirach, Judith, Tobit, and also Esther, while with most other authorities he included both Esdras A and B in the Old Testament canon ..."
Salvesen, Alison G. "Deuterocanonical and Apocryphal Books" in Salvesen, Alison, and T. M. Law (eds.) The Oxford Handbook of the Septuagint (pp. 385-402) Oxford University Press, 2021