1 Corinthians 11:28-32

But let a man prove himself, and thus eat of the bread, and drink of the cup. For the eater and drinker eats and drinks judgment to himself, not distinguishing the body. On this account many among you are weak and infirm, and a good many are fallen asleep. But if we judged ourselves, so were we not judged. But being judged, we are disciplined of the Lord, that we may not be condemned with the world.