Joseph Smith on The Day Limited in David

Christ, in the days of his flesh, proposed to make a covenant with them, but they rejected him and his proposals, and in consequence thereof, they were broken off, and no covenant was made with them at the time. But their unbelief has not rendered the promise of God of none effect; no, for there was another day limited in David which was the day of his power and then his people Israel, should be a willing people and he would write his laws in their hearts and print them in their thoughts their sins and their iniquities he would remember no more.