It is reported commonly that there is fornication among you, and such fornication as is not so much as named among the Gentiles, that one should have his father's wife.
All Commentaries on 1 Corinthians 5:1 Go To 1 Corinthians 5
Cornelius a Lapide
s3 , 4.—For I verily as absent in body . . . in the name of our Lord Jesus Christ. As it behoves a Pastor and Bishop to be always present by vigilant care, even though absent in bidy from the Church, I have already judged, i.e, determined; and by these words I now order that he be excommunicated and handed over to Satan, and that in the name of Christ, by His authority which I wield when I order and judge.
Chrysostom refers the clause in the name of our Lord Jesus Christ to what follows, when ye are gathered together. Paul means that they were to assemble, and in a public congregation of the Church they were to excommunicate the incestuous person. This clause, thirdly, may be referred to the words to deliver such an one to Satin; such delivery and execution of the sentence would be done in the power, name, and place of Christ.