That no [man] go beyond and defraud his brother in [any] matter: because that the Lord [is] the avenger of all such, as we also have forewarned you and testified.
Berean Study Bible (BSB) - 1 Thessalonians 4:6 >and no one should ever violate or exploit his brother in this regard, because the Lord will avenge all such acts, as we have already told you and solemnly warned you.
Textus Receptus (TR) - 1 Thessalonians 4:6 >τὸ μὴ ὑπερβαίνειν καὶ πλεονεκτεῖν ἐν τῷ πράγματι τὸν ἀδελφὸν αὐτοῦ· διότι ἔκδικος ὁ Κύριος περὶ πάντων τούτων, καθὼς καὶ προείπαμεν ὑμῖν καὶ διεμαρτυράμεθα.