'Household' in the Bible

“Aaron will present the bull for his sin offering and make atonement for himself and his household.

“When Aaron presents the bull for his sin offering and makes atonement for himself and his household, he will slaughter the bull for his sin offering.

And there shall be no man in the tabernacle of the congregation when he goeth in to make an atonement in the holy place, until he come out, and have made an atonement for himself, and for his household, and for all the congregation of Israel.

You must not have sexual intercourse with your sister, whether she is your father's daughter or your mother's daughter, whether she is born in the same household or born outside it; you must not have sexual intercourse with either of them.