Cursed he lying with his daughter-in-law: and all the people said Amen.

But if the man doesn’t want to marry his sister-in-law, she must go to the elders at the city gate and say, ‘My brother-in-law refuses to preserve his brother’s name in Israel. He isn’t willing to perform the duty of a brother-in-law for me.’

and behold, he has made baseless charges against her, saying, “I did not find in your daughter the evidence of her virginity.” But this is the evidence of my daughter’s virginity.’ And they shall spread out the garment before the elders of the city.

‘The one who sleeps with his sister, whether his father’s daughter or his mother’s daughter is cursed.’
And all the people will say, ‘Amen!’

Neither shalt thou make marriages with them; thy daughter thou shalt not give unto his son, nor his daughter shalt thou take unto thy son.

“When brothers live on the same property and one of them dies without a son, the wife of the dead man may not marry a stranger outside the family. Her brother-in-law is to take her as his wife, have sexual relations with her, and perform the duty of a brother-in-law for her.