Master, Moses said that if a man's brother comes to his end, having a wife, but no children, his brother is to take the wife, and get a family for his brother.
Then Judah said to Tamar, his daughter-in-law, Go back to your father's house and keep yourself as a widow till my son Shelah becomes a man: for he had in his mind the thought that death might come to him as it had come to his brothers. So Tamar went back to her father's house.
Then Judah said openly that they were his, and said, She is more upright than I am, for I did not give her to Shelah my son. And he had no more connection with her.
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.