Parallel
Proverbs 4:23
Swete's Septuagint · Berean Standard Bible
πάσῃ φυλακῇ τήρει σὴν καρδίαν· ἐκ γὰρ τούτων ἔξοδοι ζωῆς.
Guard your heart with all diligence, for from it flow springs of life.