Brigham urges Saints to obey the Word of Wisdom.
Brigham Young, "Word of Wisdom,", August 17, 1867, Journal of Discourses, 26 vols. (Liverpool: Albert Carrington, 1869), 14:117
We, for instance, exhort the Saints to observe the Word of Wisdom, that they may, through its observance, enjoy the promised blessing. Many try to excuse themselves because tea and coffee are not mentioned, arguing that it refers to hot drinks only. What did we drink hot when that Word of Wisdom was given? Tea and coffee. It definitely refers to that which we drink with our food. I said to the Saints at our last annual Conference, the Spirit whispers to me to call upon the Latter-day Saints to observe the Word of Wisdom, to let tea, coffee, and tobacco alone, and to abstain from drinking spirituous drinks. This is what the Spirit signifies through me.