Jamieson, Fausset & Brown, on Rom 3:4

“But God is true; and every man a liar, as it is written, That thou mayest be justified in thy words, and mayest overcome when thou art judged.”

“God forbid--literally, "Let it not be," that is, "Away with such a thought"--a favorite expression of our apostle, when he would not only repudiate a supposed consequence of his doctrine, but express his abhorrence of it. "The Scriptures do not authorize such a use of God's name as must have been common among the English translators of the Bible" [HODGE]. yea, let God be--held true, and every man a liar--that is, even though it should follow from this that every man is a liar. when thou art judged--so in Psa 51:4, according to the Septuagint; but in the Hebrew and in our version, "when thou judgest." The general sentiment, however, is the same in both--that we are to vindicate the righteousness of God, at whatever expense to ourselves.”

Imported from an open dataset — not yet checked against the printed edition.