George Leo Haydock

Defraud….your brethren. That is, you still make yourselves much more guilty by the injustices done to one another: for the unjust, and all they who are guilty of such crimes as I have mentioned, shall not possess the kingdom of God. And some of you were guilty of part of them, which have been washed off by your conversion, and your baptism, when you were justified. (Witham) — And such some of you were. It is probable that this was added by the apostle, to soften his preceding words, lest he might seem to accuse all the Corinthians of each of these sins, and he likewise adds, such indeed you were, but now you are washed, &c. &c. (Estius; St. Thomas Aquinas)