| Barnes' Notes on the Bible Thy testimonies that thou hast commanded - Thy law, considered as a testimony as to what is right and best. Are righteous and very faithful - Margin, as in Hebrew, "righteousness and faithfulness." They are "so" righteous, and so deserving of confidence - so certain to be accomplished, and so worthy to be trusted in - that they may be spoken of as "righteousness" and "fidelity" of the most perfect kind; the very essence of that which is right.
Clarke's Commentary on the BibleThy testimonies - Every thing that proceeds from thee partakes of the perfections of thy nature.
Gill's Exposition of the Entire BibleThy testimonies that thou hast commanded are righteous,.... The Scriptures are holy, just, and good; and what is contained in them are according to godliness; are for instruction in righteousness, and teach men to live soberly, righteously, and godly; and very faithful; or "true" (u): all the sayings in them are true and faithful sayings; for they are the sayings of God that cannot lie; the promises in them are faithfully performed by him that made them; they are all yea and amen in Christ. The words may be rendered, "thou hast commanded righteousness in thy testimonies, and truth" or faith "exceedingly": so the Arabic version. God in the law requires of men a perfect righteousness, every way agreeable to its demands; and in his Gospel he reveals the complete righteousness of his Son, which he has commanded to be published in it, to be laid hold on and received by faith as a justifying righteousness, as it is to all that believe: this, with every other truth of the Gospel, is made manifest by the Scriptures according to the commandment of the everlasting God, Romans 16:25. (u) "et verissimae", Vatablus, "veritas valde, i.e. prorsus verissima", Gejerus.
Geneva Study BibleThy testimonies that thou hast commanded are {a} righteous and very faithful. (a) We cannot confess God to be righteous, unless we live uprightly and truly as he has commanded.
King James Translators' Notesrighteous: Heb. righteousness faithful: Heb. faithfulness
Matthew Henry's Concise Commentary119:137-144 God never did, and never can do wrong to any. The promises are faithfully performed by Him that made them. Zeal against sin should constrain us to do what we can against it, at least to do more in religion ourselves. Our love to the word of God is evidence of our love to God, because it is designed to make us partake his holiness. Men's real excellency always makes them low in their own eyes. When we are small and despised, we have the more need to remember God's precepts, that we may have them to support us. The law of God is the truth, the standard of holiness, the rule of happiness; but the obedience of Christ alone justifies the believer. Sorrows are often the lot of saints in this vale of tears; they are in heaviness through manifold temptations. There are delights in the word of God, which the saints often most sweetly enjoy when in trouble and anguish. This is life eternal, to know God and Jesus Christ whom he has sent, Joh 17:3. May we live the life of faith and grace here, and be removed to the life of glory hereafter.
Matthew Henry's Whole Bible CommentaryVerses 137-138 Here is, 1. The righteousness of God, the infinite rectitude and perfection of his nature. As he is what he is, so he is what he should be, and in every thing acts as becomes him; there is nothing wanting, nothing amiss, in God; his will is the eternal rule of equity, and he is righteous, for he does all according to it. 2. The righteousness of his government. He rules the world by his providence, according to the principles of justice, and never did, nor ever can do, any wrong to any of his creatures: Upright are thy judgments, the promises and threatenings and the executions of both. Every word of God is pure, and he will be true to it; he perfectly knows the merits of every cause and will judge accordingly. 3. The righteousness of his commands, which he has given to be the rule of our obedience: "Thy testimonies that thou hast commanded, which are backed with thy sovereign authority, and to which thou dost require our obedience, are exceedingly righteous and faithful, righteousness and faithfulness itself." As he acts like himself, so his law requires that we act like ourselves and like him, that we be just to ourselves and to all we deal with, true to all the engagements we lay ourselves under both to God and man. That which we are commanded to practise is righteous; that which we are commanded to believe is faithful. It is necessary to our faith and obedience that we be convinced of this. | 
