The New Testament manuscripts are all different, some a little, others a lot. In Luke's account of the Last Supper in 22:14-23, Jesus does more than give his disciples the bread and the cup of wine as he does in Mark. In these manuscripts and most English translations, he gives to his disciples the cup, then the bread, and then the cup again.

In verse 19, he speaks of his body "which is given for you," and in verse 20 he calls the (second) cup "the new covenant of my blood." Nowhere else in Luke's Gospel does Jesus claim that his death is a sacrifice that brings salvation. Luke is missing all claims that are present in both Mark and Matthew (Mark 10:45; Matt 20:28).

Additionally, some of the ancient manuscripts do not include this portion of the passage. The early Christian writers who quote Luke's account of the Last Supper did not know that the verses exist. Therefore, some researchers claim they may have been added to this Gospel by scribes who wanted to stress the proto-orthodox understanding of salvation through Jesus' broken body and shed blood. This finding is significant because nowhere else does Luke express Mark's view that Jesus' death was a sacrifice that brought an atonement for sin.

(Adopted from Bart D. Ehrman's The New Testament: A Historical Introduction to the Early Christian Writings, Fourth Edition. New York: Oxford University Press, 2008.)

See Peculiarities Of The Gospels