This instruction is new. The emphasis here is on the family, and on the patriarch of the family leading the prayer. There is to be a prayer in families, and the idea that through the prayer the wives and children will be blessed indicates that this is an instruction to the fathers, indicating their responsibility in and for the family. The fathers are to lead in family prayer. This role of the fathers and the need for prayer in the family is underscored in the proclamation on the Family:
“THE FAMILY is ordained of God. Marriage between man and woman is essential to His eternal plan. Children are entitled to birth within the bonds of matrimony, and to be reared by a father and a mother who honor marital vows with complete fidelity. Happiness in family life is most likely to be achieved when founded upon the teachings of the Lord Jesus Christ. Successful marriages and families are established and maintained on principles of faith, prayer, repentance, forgiveness, respect, love, compassion, work, and wholesome recreational activities. By divine design, fathers are to preside over their families in love and righteousness and are responsible to provide the necessities of life and protection for their families. Mothers are primarily responsible for the nurture of their children. In these sacred responsibilities, fathers and mothers are obligated to help one another as equal partners. Disability, death, or other circumstances may necessitate individual adaptation. Extended families should lend support when needed.” (1995 the First Presidency and the Quorum of the Twelve Apostles.)