A.T. Robertson Commentary 1 Corinthians 6:6

"but brother goeth to law with brother, and that before unbelievers?" — 1 Corinthians 6:6 (ASV)

And that before unbelievers (κα τουτο επ απιστων). Climactic force of κα. The accusative of general reference with τουτο. "That there should be disputes about βιωτικα is bad; that Christian should go to law with Christian is worse; that Christians should do this before unbelievers is worst of all" (Robertson and Plummer).