1 Corinthians 10:16
The cup of blessing which we bless, is it not the communion of the blood of Christ? The bread which we break, is it not the communion of the body of Christ?
1 Corinthians 11:25
In the same manner He also took the cup after supper, saying, This cup is the new covenant in My blood. This do, as often as you drink it, in remembrance of Me.
1 Corinthians 11:27
Therefore whoever eats this bread or drinks this cup of the Lord in an unworthy manner will be guilty of the body and blood of the Lord.
Now let's highlight other words:
1 Corinthians 10:16
The cup of blessing which we bless, is it not the communion of the blood of Christ? The bread which we break, is it not the communion of the body of Christ?
1 Corinthians 11:25
In the same manner He also took the cup after supper, saying, This cup is the new covenant in My blood. This do, as often as you drink it, in remembrance of Me.
1 Corinthians 11:27
Therefore whoever eats this bread or drinks this cup of the Lord in an unworthy manner will be guilty of the body and blood of the Lord.
What supper??
Why PASSOVER; of course! A once a year meal!!
I'm going to take a JEWISH inderstanding of what Jesus said during a PASSOVER meal,
instead of a Roman one: https://jewsforjesus.org/publications/newsletter/newsletter-mar-2002/the-mystery-of-the-passover-cup/
They were not just observing this sacred "the breaking of the bread" once a year in Acts 2! It says they "devoted" themselves to the "breaking of the bread" every day intheir house churches. (If you want to object that this was just eating bread at home, why would it be listed with their religious practices as something they were "devoted to," along with prayers and Temple?) Or in Corinthians, which I cited before, which does not even hint that this is restricted to Passover.
And the early Church continued on even after the Temple was destroyed, meeting once a week for this Eucharistia, this "the breaking of the bread." as Justin Martyr describes in the Second Century (First Apologia, written 150 AD).