Basically the entire new testament. This doesn't mean non professing people should be denied coming to church. To the contrary, they shouldnt. But only those who profess Christ are biblically considered to be the church. Not from a "Church roll " standpoint, but in the eyes of Christ. Christ gave Himself for the church. Scripture speaks of the bride of Christ being the church. We see hypocrisy in churches because honestly , it's there sometimes. But go to the underground church in China where they will throw you in prison for years if not worse for attending church and you may see the value of it. Go to the jungles of the Amazon where they gather and praise Jesus in Spirit and truth and you will see the true church. No matter what anyone says, the church is for believers and followers of Christ. " Forsake not the assembling of yourselves, as some are in the habit of doing" Hebrews 10 / 25. It's there for our good. Hang in there f150