Saul began ravaging the church, entering house after house, and dragging off men and women, he would put them in prison (Acts 8:3)

…serving the Lord with all humility and tears and with trials which came upon me through the plots of the Jews; I did not shrink from declaring to you anything that was profitable, and teaching you publicly and from house to house, solemnly testifying to both Jews and Greeks of repentance toward God and faith in our Lord Jesus Christ (Acts 20:20-21)

What a great illustration of God’s grace in transforming Paul’s heart and actions, from going house to house as a persecutor of Christ to going house to house as a proclaimer of Christ!