What is the requirement for us as a believer in whom we are not to eat with in fellowship?
1 Corinthians 5:11 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 idolator, or a railer, or a drunkard, or an extortioner; with such an one no not to eat. 12 For what have I to do to judge them also that are without? do not ye judge them that are within? 13 But them that are without God judgeth. Therefore put away from among yourselves that wicked person.
Will God do any less for those saved believers found in unrepentant iniquity to be "put out" from attending the Marriage Supper in Heaven?
What is the purpose of the church excommunicating an unrepentant but saved believer?
1 Corinthians 5:4 In the name of our Lord Jesus Christ, when ye are gathered together, and my spirit, with the power of our Lord Jesus Christ, 5 To deliver such an one unto Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.
Paul hints to us throughout his letters not to associate with unbelievers, and I believe that "this man" who called himself a christian was just that, an unbeliever.
1 Cor 5:5 is saying that this man should go back out into the world to learn his lesson and ask God for forgiveness so that he can come to a true repentance and saving faith and become a real believer. The repentance of the church is also in 2 Cor 7.
1 Cor 5:11 But now I am writing to you that you must not associate with anyone
who claims to be a brother or sister but is sexually immoral or greedy, an idolater or slanderer, a drunkard or swindler. Do not even eat with such people.
https://www.easyenglish.bible/bible-commentary/1-corinthians-lbw.htm ......
Verses 11-12
Paul explains that he was talking about people who called themselves Christians. He meant Christians who continued to *sin. He spoke about:
3. the *worship of false gods. This is a *sin against the only real God. If a person does not *worship God, he will *worship something or someone else. He might trust in things that he thinks will bring him luck. He might make another person, like a singer or a man who is good at sport into an *idol.
A person who does all this is not a real Christian. The other Christians should not even share a meal with him. To share a meal would make it seem as if they agreed with his bad behaviour.
Verses 12-13
Only God can judge those who do not belong to the church. God alone knows their hearts. But the members of the church must judge someone in the church who does wrong things. The people outside the church must see that the Christian *faith is a different way to live. If Christians refused to punish such a serious *sin, they were a poor witness to their new *faith. Paul gave a definite command, ‘Throw the man out’. He used words from Deuteronomy 17:7; 24:7. The Christian church in Corinth must put out evil people.
Since Satan will be waging war on the saints in killing the saints during the great tribulation, the purpose of leaving unrepentant saints behind can be seen for the same reason if not literally moreso when God excommunicates unrepentant brethren from eating with abiding saints at the Marriage Supper.
Paul makes it clear in his letters to Corinth not to associate with unbelievers, and I believe the man in 1 Cor 5 is in reference to an unbeliever.
1Co 6:6 But instead, one brother takes another to court—and this in front of unbelievers!
1Co 14:22 Tongues, then, are a sign, not for believers but for unbelievers; prophecy, however, is not for unbelievers but for believers.
1Co 14:23 So if the whole church comes together and everyone speaks in tongues, and inquirers or unbelievers come in, will they not say that you are out of your mind?
2Co 4:4 The god of this age has blinded the minds of unbelievers, so that they cannot see the light of the gospel that displays the glory of Christ, who is the image of God.
2Co 6:14 Do not be yoked together with unbelievers. For what do righteousness and wickedness have in common? Or what fellowship can light have with darkness?
God will be judging His House first and He is faithful in doing a good job in keeping the souls of the saints left behind that will suffer in the bed of the great tribulation. Why? Because they are saved, still having His seal, but failure to look to the author & finisher of our faith in running that race is to be disqualified from attending the Marriage Supper of the Lamb in Heaven.
Tit 1:16
They profess that they know God; but in works they deny him, being abominable, and disobedient, and unto every good work reprobate.
Barnes' Notes on the Bible - "But now." In this Epistle. This shows that he had written a former letter. I have written to you. - Above.
I have designed to give this injunction that you are to be entirely separated from one who is a professor of religion and who is guilty of these things.
Not to keep company - To be wholly separated and withdrawn from such a person. Not to associate with him in any manner.
If any man that is called a brother - Any professing Christian; any member of the church.
Be a fornicator ... - Like him who is mentioned, 1 Corinthians 5:1.
Or an idolater - This must mean those persons who,
while they professed Christianity, still attended the idol feasts, and worshipped there. Perhaps a few such may have been found who had adopted the Christian profession hypocritically.
With such an one no not to eat - To have no contact or fellowship with him of any kind; not to do anything that would seem to acknowledge him as a brother; with such an one not even to eat at the same table. A similar course is enjoined by John; 2 John 1:10-11. This refers to the contact of common life, and not particularly to the communion. The true Christian was wholly to disown such a person, and not to do anything that would seem to imply that he regarded him as a Christian brother.
It will be seen here that the rule was much more strict in regard to one who professed to be a Christian than to those who were known and acknowledged pagans. The reasons may have been:
(1) The necessity of keeping the church pure, and of not doing anything that would seem to imply that Christians were the patrons and friends of the intemperate and the wicked.
(2) in respect to the pagan, there could be no danger of its being supposed that Christians regarded them as brethren, or showed to them any more than the ordinary civilities of life;
but in regard to those who professed to be Christians, but who were drunkards, or licentious, if a man was on terms of intimacy with them, it would seem as if he acknowledged them as brethren and recognized them as Christians.
Gill's Exposition of the Entire Bible - not to keep company, if any man that is called a brother, be a fornicator; or if any man that is a brother is called, or named a fornicator; or covetous, or an idolater; or a railer, or a drunkard, or an extortioner, with such an one, no, not to eat. The apostle's meaning is, that in his prohibition of keeping company with men of the above character, he would be understood of such persons as were called brethren;
who had been received into the church, and had been looked upon, and had professed themselves to be such;