Parallel
2 Thessalonians 1:6
Robinson-Pierpont Byzantine Textform · Berean Standard Bible
εἴπερ δίκαιον παρὰ θεῷ ἀνταποδοῦναι τοῖς θλίβουσιν ὑμᾶς θλίψιν,
After all, it is only right for God to repay with affliction those who afflict you,