Romans 3:7-8 — For if the truth of God hath more abounded through my lie unto His glory; why yet am I also judged as a sinner?
And not rather, (as we be slanderously reported, and as some affirm that we say,) Let us do evil, that good may come? whose damnation is just.
Truth of God — the truthfulness of God.
The Jews, opposed to salvation by grace, were accusing Paul of teaching a lie — "Let us do evil …"
Justification by faith is not license to sin. Those who take that license deserve condemnation.