Genesis 38 8
Judah told Onan, “Go and sleep with your brother's wife to fulfill the requirements of a brother-in-law to have children on behalf of your brother.”
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NLT Genesis 38:8Then Judah said to Er’s brother Onan, “Go and marry Tamar, as our law requires of the brother of a man who has died. You must produce an heir for your brother.”
WEB Genesis 38:8Judah said to Onan, “Go in to your brother’s wife, and perform the duty of a husband’s brother to her, and raise up offspring for your brother.”
KJV Genesis 38:8And Judah said unto Onan, Go in unto thy brother’s wife, and marry her, and raise up seed to thy brother.