“Believe on the Lord Jesus Christ, and you will be saved, you and your household.” – Acts 16:31

“Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.” Are there not many believers who do not believe for their house. Come, now, and believe in His provision of the Lamb for the house. Trust the grace of God for that little girl, the last born, and for that boy who is still at school, who does not think much of these things as yet; and for that son of yours who has left home and gone out as an apprentice. Oh, that the Lamb of God might be for him! Pray for him; and you older parents, pray for your sons who are married, and your daughters who have taken to themselves husbands, and are away from you. The Lamb is for the house, pray for the whole household; take in your grandchildren, all you old folks, all of them who are in your house. Pray that the Lamb may be for the house. I do bless God that I can look upon all my household and rejoice that they are converted to Christ. My father has this joy, too; and my grandfather also had that joy. Oh, it is a great bliss to have families, generation after generation, all brought to Christ without exception! Why should it not be so? Let us cry for it; surely, we may expect the same blessing that God gave to His chosen people under the law and expect it more largely. Grace does not run in the blood, but grace often runs side by side with it, so that Abraham is loved, and Isaac, and Jacob, and Joseph, and Ephraim, and Manasseh. Thus, the covenant blessing goes from one to another. Plead with God that all in your house may be beneath the sprinkled blood of the Lamb, and be saved from the destroying angel, and that all with you may go out of Egypt to have a possession in the land of the promised. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2329.cfm