"Except a man and his wife enter into an everlasting covenant and be married for eternity, while in this probation, by the power and authority of the Holy Priesthood, they will cease to increase when they die; that is, they will not have any children after the resurrection. But those who are married by the power and authority of the Priesthood in this life, and continue without committing the sin against the Holy Ghost, will continue to increase and have children in the celestial glory."

(Joseph Fielding Smith, Church History and Modern Revelation, 4 vols. [Salt Lake City: The Church of Jesus Christ of Latter-day Saints, 1946-1949], 4: 159)