It is remarkable how a simple question can help give greater insight into deep spiritual matters. Jesus showed this when He asked the Jews two simple questions. “The baptism of John—where was it from? From heaven or from men?” (Matt. 21:25). In a similar manner, two questions can be given to those who ask, “Where does the Bible say we should have the Lord’s Supper every Sunday?”
The first question is, “Where does the Bible teach that we should worship every Sunday?” There is no question that almost every denomination meets every Sunday and expects members to assemble. By what authority? Where does the Bible teach this?
It is true that three major events happened on the first day of the week. Sunday was the day of His resurrection as He described as happening on the third day. His disciples said that Sunday was the third day (Luke 24:1, 21). The second event was the beginning of the church on Pentecost. Pentecost always occurred on Sunday (Lev. 23:15-16). The third major event was baptism of the Holy Spirit. However, the fact these events happened on Sunday does not demand a regular weekly Sunday gathering.
There are only two references which show the early church met on Sunday. Acts 20 shows that Paul, while hurrying to get to Jerusalem, delayed his journey seven days in Troas and preached to the church on Sunday (Acts 20:16 and Acts 20:7). This shows that, at least in that city, the church assembled to worship on Sunday. Is this proof enough for most churches to assemble on Sunday? There is more proof.
Look at the only other reference which shows the church assembled on Sunday. Paul mentions that he commanded the churches in Galatia to gather money for the poor on Sundays and gave orders to the church in Corinth to do the same (1 Cor. 16:1-2). The Greek indicates these orders involved doing this every Sunday, and several translations show this.
The point has been established. The church did assemble every week. That second question is, “Why did they meet?” The answer—it was to eat the Lord’s Supper. Acts 20:7 says they assembled to eat the Lord’s Supper. The church at Corinth assembled every Sunday and the expressed reason they assembled was to eat the Lord’s Supper (1 Cor. 11:22-33, especially verse 33).
When we establish that the Bible demands a weekly assembly, the same verses establish the fact they assembled to eat the Lord’s Supper. The Sunday assembly is mentioned only twice and both times the Bible shows the primary reason they assembled was to have communion!