1 Corinthians 5 v 12-13


1 Corinthians 5:12-13
(12)  For what have I to do to judge them also that are without? do not ye judge them that are within?
(13)  But them that are without God judgeth. Therefore put away from among yourselves that wicked person.


5:12-13. It was not Paul’s business to judge those outside the church (cf., e.g., his silence about the woman in 5:1); still less was it the business of the Corinthians. But discipline within the church was their responsibility.

Those in the world God will judge (cf. Acts 17:31). But those within the Christian community who continue in sin with an unrepentant spirit, the church should discipline by expulsion.

Excerpt from:
Walvoord, J. F., Zuck, R. B., & Dallas Theological Seminary. (1983-c1985). 
The Bible knowledge commentary : An Exposition of the Scriptures. 
Wheaton, IL: Victor Books.