Then Boaz said, “The day you buy the field from the hand of Naomi, you are also buying Ruth the Moabitess, the widow of the dead, in order to restore the name of the dead to his inheritance.”
and they asked him a question, saying, “Teacher, Moses wrote for us that if a man's brother dies, having a wife but no children, the man must take the wife and raise up children for his brother.
And if the man does not wish to take his brother's wife, then his brother's wife shall go up to the gate to the elders, and say, ‘My husband's brother refuses to perpetuate his brother's name in Israel; he will not perform the duty of a husband's brother to me.’