Doctrine and Covenants 89–92
In the School of the Prophets, the Prophet Joseph Smith taught the elders of Israel about building God’s kingdom on earth. They discussed spiritual truths, prayed together, fasted, and prepared to preach the gospel. But there was something about the atmosphere that might seem odd to us today, and it didn’t seem right to Emma Smith either. During the meetings, the men smoked and chewed tobacco, which wasn’t unusual for the time, but it stained the wood floors black and left a strong odor in the air. Emma shared her concerns with Joseph, and Joseph asked the Lord. His response was a revelation that went far beyond smoke and tobacco stains. It gave the Saints, for generations to come, “a principle with promise”—promises of physical health, “wisdom,” and “great treasures of knowledge” (Doctrine and Covenants 89:3, 19).
See also Saints, 1:166–68.