Ezra Taft Benson taught,

“Why did righteous fathers in the Book of Mormon go to so much trouble to teach their sons the word of God? King Benjamin said it was to fulfill the commandments of God. (See Mosiah 1:4.) He further stated that were it not for their having the brass plates which contained the commandments, they would have “suffered in ignorance.” ( Mosiah 1:3.) Could the lack of teaching the scriptures in our homes be a source of our suffering in ignorance today?”

“Worthy Fathers, Worthy Sons”
October 1985 General Conference