What is the meaning of 1 Thessalonians 4:6?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

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.

Berean Standard Bible (BSB)

that no one should take advantage of and wrong a brother or sister in this matter; because the Lord is an avenger in all these things, as also we forewarned you and testified.

World English Bible (WEB)

That no{G3361} man go beyond{G5233}{(G5721)} and{G2532} defraud{G4122}{(G5721)} his{G846} brother{G80} in{G1722} any matter{G4229}: because{G1360} that the Lord{G2962} is the avenger{G1558} of{G4012} all{G3956} such{G5130}, as{G2531} we{G4277} also{G2532} have forewarned{G4277}{(G5656)} you{G5213} and{G2532} testified{G1263}{(G5662)}.

Strong's King James

(6) That nobody transgress and exploit his brother in this matter because אָדוֹן Adonai is avenging in all this, just as we also told and warned you beforehand.

The F.O.G*

[6] In these matters of sexuality and marriage, no one should ever violate or take advantage of their brother or sister in the faith. The Lord יהוה is the defender of His people and will surely bring justice against all such violations, exactly as we warned you before with utmost seriousness.

The F.O.G Paraphrase

that no one go beyond and defraud in the matter his brother, because an avenger is the Lord of all these, as also we spake before to you and testified,

Young's Literal Translation