George A. Smith, Journal of Discourses — Volume 12…
“ The observance of the Sabbath, as well as the observance of every other commandment of God, has a tendency to prolong human life. There is nothing to prevent us commencing, by observing the Word of Wisdom, to lengthen our days, in accordance with the words of the prophecies of Isaiah, which says, "for as the days of a tree are the days of my people." ”
