1 Corinthians 11:23-29

For I received from the Lord Himself that [instruction] which I passed on to you, that the Lord Jesus on the night in which He was betrayed took bread; and when He had given thanks, He broke it and said, “This is (represents) My body, which is [offered as a sacrifice] for you. Do this in [affectionate] remembrance of Me.” In the same way, after supper He took the cup, saying, “This cup is the new covenant [ratified and established]in My blood; do this, as often as you drink it, in [affectionate]remembrance of Me.” For every time you eat this bread and drink this cup, you are [symbolically] proclaiming [the fact of] the Lord’s death until He comes [again]. So then whoever eats the bread or drinks the cup of the Lord in a way that is unworthy [of Him] will be guilty of [profaning and sinning against] the body and blood of the Lord. But a person must [prayerfully] examine himself [and his relationship to Christ], and only when he has done so should he eat of the bread and drink of the cup. For anyone who eats and drinks [without solemn reverence and heartfelt gratitude for the sacrifice of Christ], eats and drinks a judgment on himself if he does not recognize the body [of Christ].