Proverbs 8:7

For my mouth shall speak truth
And nothing but the truth; and nothing more or less can be spoken by Wisdom, or Christ, who is truth itself; nothing else can come out of his mouth, or drop from his lips; all the doctrines of Christ are agreeable to the Scriptures of truth, and are what the Spirit of truth leads into; and the whole is called "the word of truth": there are many very particular and special truths, but the principal one is salvation by Jesus Christ;

and wickedness [is] an abomination to my lips;
the sin of lying more especially, as opposed to truth; this is detestable to wisdom, what Christ never suffered his lips to utter; for no lie is of the truth, but of Satan the father of lies; and, as it is abhorred by Christ, it ought to be by all good men.