Journal of Discourses 23:174-175; “It is believed by many in the Christian world, that our Savior finished his mission when he expired upon the cross, and his last words on the cross, as given by the Apostle John—”it is finished,” are frequently quoted as evidence of the fact; but this is an error. Christ did not complete his mission upon the earth until after his body was raised from the dead. Had his mission been completed when he died, his disciples would have continued fishermen, carpenters, etc., for they returned to their several occupations soon after the crucifixion…” – Joseph F. Smith, Salt Lake City, June 18, 1882
John 19:30; “When Jesus therefore had received the vinegar, he said, It is finished: and he bowed his head, and gave up the ghost.”
Jesus finished his mission upon earth by giving His body as a sacrifice for our sins. Period.