THE GOSPEL ACCORDING TO LUKE - Chapter 22 - Verse 17
Verse 17. And he took the cup and gave thanks. This was not the
sacramental cup, for that was taken after supper, Lu 22:20.
This was one of the cups which were usually taken during the celebration
of the Passover, and pertained to that observance. After he had kept
this in the usual manner, he instituted the supper which bears his
name, using the bread and wine which had been prepared for the Passover,
and thus ingrafted the Lord's Supper on the Passover, or superseded the
Passover by another ordinance, which was intended to be perpetual.