1 Corinthians 5:8; 1 Corinthians 5:11; 1 Corinthians 10:7-10

1 Corinthians 5:8

8 Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth.

1 Corinthians 5:11

11 But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat.

1 Corinthians 10:7-10

7 Neither be ye idolaters, as were some of them; as it is written, The people sat down to eat and drink, and rose up to play.

8 Neither let us commit fornication, as some of them committed, and fell in one day three and twenty thousand.

9 Neither let us tempt Christ, as some of them also tempted, and were destroyed of serpents.

10 Neither murmur ye, as some of them also murmured, and were destroyed of the destroyer.