1 Corinthians 5:5-7

Amplified Bible

⁵you are to ^[a]hand over this man to Satan for the destruction of his body, so that his spirit may be saved in the day of the Lord Jesus.

⁶Your boasting [over the supposed spirituality of your church] is not good [indeed, it is vulgar and inappropriate]. ^[b]Do you not know that [just] a little leaven ferments the whole batch [of dough, just as a little sin corrupts a person or an entire church]? ⁷^[c]Clean out the old leaven so that you may be a new batch, just as you are, still unleavened. For Christ our Passover Lamb has been sacrificed.

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Footnotes

1 Corinthians 5:5 Probably a call for the man to be excommunicated and removed from the safety and blessing of the church.
1 Corinthians 5:6 See note 3:16.
1 Corinthians 5:7 Paul is using the Passover celebration as an analogy. Leading up to the Passover meal was the Feast of Unleavened Bread (Ex 12:17-20), during which the Israelites were to remove all leaven from their homes to symbolize the removal of sin from their lives. Leaven (yeast) was often used as a symbol of spiritual corruption.