1 Corinthians 5:8-10

New Revised Standard Version Catholic Edition

⁸ Therefore, let us celebrate the festival, not with the old yeast, the yeast of malice and evil, but with the unleavened bread of sincerity and truth.

Sexual Immorality Must Be Judged

⁹ I wrote to you in my letter not to associate with sexually immoral persons— ¹⁰ not at all meaning the immoral of this world, or the greedy and robbers, or idolaters, since you would then need to go out of the world.