Before he was crucified, Jesus established Holy Communion for his church.
According to the Bible:
But He was wounded for our transgressions, He was bruised for our iniquities; the chastisement for our peace was upon Him, and by His stripes we are healed. (Isaiah 53:5)
…when He had given thanks, He broke it and said, “Take, eat; this is My body which is broken for you; do this in remembrance of Me.” 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 11:24–25)
We take Communion together every Saturday night to remind ourselves of all that the Lord Jesus did for us.