President Joseph Fielding Smith taught:

“It is the duty of parents to teach their children these saving principles of the gospel of Jesus Christ, so that they will know why they are to be baptized and that they may be impressed in their hearts with a desire to continue to keep the commandments of God after they are baptized, that they may come back into his presence. Do you, my good brethren and sisters, want your families, your children; do you want to be sealed to your fathers and your mothers before you … ? If so, then you must begin by teaching at the cradle-side. You are to teach by example as well as precept.”

(2012 October General Conference, Becoming Goodly Parents, Sat. Afternoon Session – By L. Tom Perry)