Luke 20:28
They asked him, "Teacher, Moses wrote for us that if a man's brother dies leaving a wife but no children, that man must marry the widow and father children for his brother.
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."
Genesis 38:11
Then Judah said to his daughter-in-law Tamar, "Live as a widow in your father's house until Shelah my son grows up." For he thought, "I don't want him to die like his brothers." So Tamar went and lived in her father's house.
Genesis 38:26
Judah recognized them and said, "She is more upright than I am, because I wouldn't give her to Shelah my son." He did not have sexual relations with her again.
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.
Ruth 1:11-12
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!