In this instruction, I do not praise, because you do not convene so as to be stronger, but weaker. For firstmost, as you convene in assembly, I hear that there are divisions among you, and partly I credit this, for it is also necesary for there to be partisanships among you so that also the approved should become obvious among you. Therefore as you are convening all together, it is not to eat Lordly supper, for one does his eating of his own supper beforehand, and this one famished, that one drunk. Do you really not have houses in which to eat and drink? Or do you have contempt for the house of God and disgrace those who have nothing? What shall I say to you? Should I praise you in this? I do not praise!
For I learned from the Lord what I likewise handed down to you, that the Lord Jesus on the night he was handed over, laid hold of bread and, having given thanks, broke it and answered, This is my body, which is for you; do this in recollection of me. In like manner also the cup, after having supped, saying, This cup is the new contract in my blood; do this, as often as you might drink, in recollection of me. For provided that you eat this bread and drink this cup, you proclaim the Lord's death until he should come.
Therefore whoever should eat the bread or drink the Lord's cup unworthily, will be liable for the body and the blood of the Lord. So let a man test himself and in this way let him eat of the bread and drink of the cup. For the eater and drinker not judging the body, eats and drinks judgment on himself. Because of this many of you are weak and unhealthy, and many slumber. For if we are not judging ourselves, we are judged. And being judged by the Lord, we are disciplined, so that we are not with the world condemned.
So my brothers, in convening in order to eat, wait for each other. If anyone is famished, let him eat at home, so that you might not convene for judgment. And the rest, when I come, I will arrange.
[1 Corinthians 11:17-34, my very rough translation. The words for 'stronger' and 'weaker' can also have the figurative meanings of 'better' or 'worse'. Divisions (schismata) gives us the word for 'schism', and parties/partisanships (haereseis) gives us the word for 'heresies', but they are being used more broadly here. 'Assembly' is ekklesia, so is also 'church'. 'Recollection' could also be 'commemoration'; it is an active term for keeping in mind or bringing to mind or preserving something in memory or as a memorial. 'Contract' is also 'covenant', but the latter, of course, is a contract; covenant and memorial are ideas with longstanding mutual associations.
It's notable that Paul is not merely telling the story of the Lord's Supper; he is doing so explictily as a part of a sharp criticism of the Corinthians, highlighting what he thinks they are egregiously forgetting, that participation in it must be worthy.]