Mark 12:19
Master, in the law Moses says, If a man's brother comes to his end, and has a wife still living and no child, it is right for his brother to take his wife, and get a family for his brother.
Genesis 38:8
Then Judah said to Onan, Go in to your brother's wife and do what it is right for a husband's brother to do; make her your wife and get offspring for your brother.
Deuteronomy 25:5-10
If brothers are living together and one of them, at his death, has no son, the wife of the dead man is not to be married outside the family to another man: let her husband's brother go in to her and make her his wife, doing as it is right for a brother-in-law to do.
Ruth 1:11-13
But Naomi said, Go back, my daughters; why will you come with me? Have I more sons in my body, to become your husbands?
Ruth 4:5
Then Boaz said, On the day when you take this field, you will have to take with it Ruth, the Moabitess, the wife of the dead, so that you may keep the name of the dead living in his heritage.