1 Corinthians 6:6

but brother goeth to law with brother, and that before unbelievers?

'Not only so, but all of this happens right in the open, "in front of unbelievers". (Fee p. 237)

'and that' -calling attention to the worst feature. 'That there should be disputes.. is bad; that Christian should to go law with Christian is worse; that Christians should do this before unbelievers is worst of all.' (Robertson pp. 118-119)

'In all of this there is an implicit call to leaders to act as leaders. See that fairness and justice are given their place. Deal with covetousness! Don't let members go on exploiting others!' (McGuiggan p. 71)