| Clarke's Commentary on the Bible My mouth shall speak truth - Truth, without falsity, or any mixture of error, shall be the whole matter of my discourse.
Gill's Exposition of the Entire BibleFor 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.
Keil and Delitzsch Biblical Commentary on the Old Testamentכּי continues the reason (begun in Proverbs 8:6) for the Hearken! (cf. Proverbs 1:15-17; Proverbs 4:16.); so that this second reason is co-ordinated with the first (Fl.). Regarding אמת, vid., at Proverbs 3:3; הגה, here of the palate (cf. Psalm 37:30), as in Proverbs 15:28 of the heart, has not hitherto occurred. It signifies quiet inward meditation, as well as also (but only poetically) discourses going forth from it (vid., at Psalm 1:2). The contrary of truth, i.e., moral truth, is רשׁע, wickedness in words and principles - a segolate, which retains its Segol also in pausa, with the single exception of Ecclesiastes 3:16.
Geneva Study BibleFor my mouth shall speak truth; and wickedness is an abomination to my lips.
King James Translators' Notesan...: Heb. the abomination of my lips
Jamieson-Fausset-Brown Bible Commentary7. For . truth-literally, "My palate shall meditate," or (as Orientals did) "mutter," my thoughts expressed only to myself are truth. wickedness-specially falsehood, as opposed to truth.
Matthew Henry's Concise Commentary8:1-11 The will of God is made known by the works of creation, and by the consciences of men, but more clearly by Moses and the prophets. The chief difficulty is to get men to attend to instruction. Yet attention to the words of Christ, will guide the most ignorant into saving knowledge of the truth. Where there is an understanding heart, and willingness to receive the truth in love, wisdom is valued above silver and gold. | 
