1 Corinthians 11:29

For he that eateth and drinketh, eateth and drinketh judgment unto himself, if he discern not the body.

'judgement' -2917. krima kree'-mah; from 2919;. decision (the function or the effect, for or against ["crime"]): -avenge, condemned, condemnation, damnation,. go to law, judgment.

'unto himself' -'brings. judgement upon himself' (TCNT)

'discern' -1252. diakrino dee-ak-ree'-no; from 1223 and 2919; to separate thoroughly, i.e. (literally and reflexively) to withdraw from, or (by implication) oppose; figuratively, to discriminate (by implication, decide), or (reflexively) hesitate: -contend, make (to) differ(-ence), discern, doubt, judge, be partial, stagger, waver.

-'to distinguish, to judge correctly' (Willis p. 404) 'Failure to recognize the Lord's body, that is, reflect on his death, as they eat.' (Fee p. 563) Part of this discerning, would be, distinguishing between this "supper" and all other suppers. (1 Corinthians 11:21)