Therefore, Judah said to his son Onan: "Enter to the wife of your brother, and associate with her, so that you may raise offspring to your brother.
Other versions
King James Version
And Judah said unto Onan, Go in unto thy brother's wife, and marry her, and raise up seed to thy brother.English Standard Version
Then Judah said to Onan, "Go in to your brother's wife and perform the duty of a brother-in-law to her, and raise up offspring for your brother."New International Version
Then Judah said to Onan, "Lie with your brother's wife and fulfill your duty to her as a brother-in-law to produce offspring for your brother."