Parallel
Psalms 50:6
Swete's Septuagint · Berean Standard Bible
σοὶ μόνῳ ἥμαρτον, καὶ τὸ πονηρὰν ἐνώπιον σοῦ ἐποίησα· ὅπως ἂν δικαιωθῇς ἐν τοῖς λόγοις σου, καὶ νικήσῃς ἐν τῷ κρίνεσθαί σε.
51:4
Against You, You only, have I sinned and done what is evil in Your sight, so that You may be proved right when You speak and blameless when You judge (note: LXX and victorious when You judge; cited in Romans 3:4).