**“So then, whoever eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of sinning against the body and blood of the Lord.” 1 Cor. 11:27.
- Probably what you’re mostly looking for, so I bolded it. **
In the same reasoning, this was written about the fall of Jerusalem’s temple, used as a first catechism in A.D. 70 to teach new Christians:
The Didache
“Confess your sins in church, and do not go up to your prayer with an evil conscience. This is the way of life. . . . On the Lord’s Day gather together, break bread, and give thanks, after confessing your transgressions so that your sacrifice may be pure” (Didache 4:14, 14:1 [A.D. 70]).
Source & A good article on this topic:
catholic.com/tracts/confession
Though I’m quickly typing (gotta run), I hope that helps.
