Paul the apostle said that the bread is a sharing in the body of Christ--that there is only one body of Christ (the church) of which we all partake. Within the Christian Church, there is no limitation on the who takes the Lord's supper.
"Is not the cup of blessing which we bless a sharing in the blood of Christ? Is not the bread which we break a sharing in the body of Christ? 17 Since there is one bread, we who are many are one body; for we all partake of the one bread. 18 Look at the nation Israel; are not those who eat the sacrifices sharers in the altar?" (1 Cor. 10:16-18, NASB).
And on the first day of the week, when we were gathered together to break bread, Paul began talking to them, intending to depart the next day, and he prolonged his message until midnight." (Acts 20:7, NASB).
There is no mention of limiting communion to anyone except that they examine themselves and rightly discern that the elements represent Christ's sacrifice and not a mere meal to satisfy hunger.
"But let a man examine himself, and so let him eat of the bread and drink of the cup. 29For he who eats and drinks, eats and drinks judgment to himself, if he does not judge the body rightly." (1 Cor. 11:28-29, NASB).
No place in the Bible is communion restricted to only the 144,000--as the Witnesses teach. This is a fabrication of the Watchtower Bible and Tract Society. The fact that the Jehovah's Witnesses do not take communion is a demonstration that they are not in the body of Christ and do not have a covenant relationship with Christ. The Lord's Supper is meant for the body of believers in the true and living God who have been redeemed by the Lord Jesus Christ. The Lord's Supper is not for those who are outside the camp of Christ. Since the great majority of the Jehovah's Witnesses do not take communion, this is a testimony against them.