1 Cor 5:12–13

5:12, 13 By quoting the frequent command in Deuteronomy (e.g., Deut. 17:7) to purge or expel the wicked from Israel, Paul draws an important parallel between the Old Testament covenant community and the Christian church (10:1–11). The church has authority to exercise discipline within its own fellowship, not to regulate the behavior of non-Christians.