Genesis 38:8

Then Judah said to Onan, "Have sexual relations with your brother's wife and fulfill the duty of a brother-in-law to her so that you may raise up a descendant for your brother."

Deuteronomy 25:5-10

If brothers live together and one of them dies without having a son, the dead man's wife must not remarry someone outside the family. Instead, her late husband's brother must go to her, marry her, and perform the duty of a brother-in-law.

Leviticus 18:16

You must not have sexual intercourse with your brother's wife; she is your brother's nakedness.

Numbers 36:8-9

And every daughter who possesses an inheritance from any of the tribes of the Israelites must become the wife of a man from any family in her father's tribe, so that every Israelite may retain the inheritance of his fathers.

Ruth 1:11

But Naomi replied, "Go back home, my daughters! There is no reason for you to return to Judah with me! I am no longer capable of giving birth to sons who might become your husbands!

Ruth 4:5-11

Then Boaz said, "When you acquire the field from Naomi, you must also acquire Ruth the Moabite, the wife of our deceased relative, in order to preserve his family name by raising up a descendant who will inherit his property."

Matthew 22:23-27

The same day Sadducees (who say there is no resurrection) came to him and asked him,

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