It's actually quite public. The 'raw' doctrinal backing comes from 'Doctrine and Covenants, Section 89': https://www.churchofjesuschrist.org/study/history/topic

It's actually quite public. The 'raw' doctrinal backing comes from 'Doctrine and Covenants, Section 89': https://www.churchofjesuschrist.org/study/history/topics/word-of-wisdom-dc-89?lang=eng https://www.churchofjesuschrist.org/study/history/topics/wor... Clarifications as to what the 'hot drinks' section means has come over time, generally being shared during the twice-annual General Conference. The most prominent call came in 1921. You can read more about it here: https://www.churchofjesuschrist.org/study/manual/revelations-in-context/the-word-of-wisdom?lang=eng https://www.churchofjesuschrist.org/study/manual/revelations...