Leviticus 18:17
You must not expose the nakedness of a woman and her daughter, or her son's daughter, or her daughter's daughter; you must not take [her as wife] to expose her nakedness; they [are] {close relatives}--that [is] wickedness.
Leviticus 20:14
" 'As for a man who marries a woman and her mother, that [is] depravity; they shall burn him and them, so that it shall not become depravity in the midst of you [all].
Deuteronomy 27:23
'Cursed be the one who lies with his mother-in-law.' And all the people shall say, 'Amen.'
Amos 2:7
Those who trample the heads of the powerless into the dust of the ground and turn aside the way of the destitute, a man and his father {have sexual relations with} the same girl, so that [they] profane my holy name.