1 Corinthians 5:12-13

God judges the world, and His judgment comes apace; but now see that you judge the saints. “Put away the evil from your midst.” Let not the old leaven find its way back again. You had purged it out, your Church was like the new paschal loaf, eaten with the passion, eaten with the lamb of the sacrifice, in which no leaven is used. Now, our sacrifice is the paschal lamb and the unleavened bread, and the feast wherein they are partaken of is the spiritual Christ, crucified by the world, and the purity and freedom from the spirit of the world which accompany this sacrifice. Let us enjoy that feast, my brethren, untainted by the fermenting liquors of the world — the feast of sincerity and truth .