Genesis 38:8

Christian Standard Bible Anglicised

Then Judah said to Onan, ‘Sleep with your brother’s wife. Perform your duty as her brother-in-law  and produce offspring for your brother.’

Cross References

Ruth 1:11

But Naomi replied, ‘Return home, my daughters. Why do you want to go with me? Am I able to have any more sons who could become your husbands?

Leviticus 18:16

You are not to have sexual intercourse with your brother’s wife; she is your brother’s family.

Genesis 19:31

Then the firstborn said to the younger, ‘Our father is old, and there is no man in the land to sleep with us as is the custom of all the land.