Parallel
Isaiah 26:3
Swete's Septuagint · Berean Standard Bible
ἀντιλαμβανόμενος ἀληθείας καὶ φυλάσσων εἰρήνην. ὅτι ἐπι σοὶ
You will keep in perfect peace the steadfast of mind, because he trusts in You.