Parallel
Romans 6:20
Patriarchal Greek New Testament (1904) · Berean Standard Bible
ὅτε γὰρ δοῦλοι ἦτε τῆς ἁμαρτίας, ἐλεύθεροι ἦτε τῇ δικαιοσύνῃ.
For when you were slaves to sin, you were free of obligation to righteousness.