The responsibilities of a head of household include spiritual commitment and prayer on behalf of the household. We can understand this based on interactions among Paul, Silas, the city jailer, and a lady Lydia; in Philippi during the Second Missionary Journey. Paul and Silas found themselves in jail, where an act of compassion by Paul touched the jailer spiritually and prepared him to receive the gospel. When he asked what he needed to do to be saved, Paul and Silas advised him to make a spiritual commitment to the Lord Jesus on behalf of himself and his household.
The concept of household spiritual commitment by the head goes back to God’s covenant with Abraham, reiterated to Jacob at Bethel, and renewed at Shechem by Joshua and representatives of all Israel. Furthermore, we learn about prayer by head of household, ministering by compassion, and other principles applicable to present-day human interactions and relationships.