10 not at all meaning the people of this world who are immoral, or the greedy and swindlers, or idolaters. In that case you would have to leave this world.

Matthew Henry's Commentary on 1 Corinthians 5:10

Commentary on 1 Corinthians 5:9-13

(Read 1 Corinthians 5:9-13)

Christians are to avoid familiar converse with all who disgrace the Christian name. Such are only fit companions for their brethren in sin, and to such company they should be left, whenever it is possible to do so. Alas, that there are many called Christians, whose conversation is more dangerous than that of heathens!