BY says adultery technically requires the shedding of blood, but currently can be forgiven without taking life.
Brigham Young, "To Know God is Eternal Life," Journal of Discourses, 26 vols. (Liverpool: S.W. Richards, 1857), 4:219
The time has been in Israel under the law of God, the celestial law, for it is one of the laws of that kingdom where our Father dwells, that if a man was found guilty of adultery, he must have his blood shed, and that is near at hand. But now I say, in the name of the Lord, that if this people will sin no more, but faithfully live their religion, their sins will be forgiven them without taking life.