He excommunicates the incestuous adulterer and admonishes them to purge out the old leaven.

¹ Above all else, it is being said that there is fornication among you, even fornication of a such kind that is not among the Gentiles, so that someone would have the wife of his father.¹

1. 5:1The expression ‘wife of his father’ refers to his stepmother, not his natural mother.(Conte)

² And yet you are inflated, and you have not instead been grieved, so that he who has done this thing would be taken away from your midst.

³ Certainly, though absent in body, I am present in spirit. Thus, I have already judged, as if I were present, him who has done this.

⁴ In the name of our Lord Jesus Christ, you have been gathered together with my spirit, in the power of our Lord Jesus,

⁵ to hand over such a one as this to Satan, for the destruction of the flesh, so that the spirit may be saved in the day of our Lord Jesus Christ.

⁶ It is not good for you to glory. Do you not know that a little leaven corrupts the entire mass?

⁷ Purge the old leaven, so that you may become the new bread, for you are unleavened. For Christ, our Passover, has now been immolated.

⁸ And so, let us feast, not with the old leaven, not with the leaven of malice and wickedness, but with the unleavened bread of sincerity and truth.

⁹ As I have written to you in an epistle: “Do not associate with fornicators,”

¹⁰ certainly not with the fornicators of this world, nor with the greedy, nor with robbers, nor with the servants of idolatry. Otherwise, you ought to depart from this world.

¹¹ But now I have written to you: do not associate with anyone who is called a brother and yet is a fornicator, or greedy, or a servant of idolatry, or a slanderer, or inebriated, or a robber. With such a one as this, do not even take food.

¹² For what have I to do with judging those who are outside? But do not even you yourselves judge those who are inside?

¹³ For those who are outside, God will judge. But send this evil person away from yourselves.