"'You shall not uncover the nakedness of your son's daughter, or of your daughter's daughter, even their nakedness: for theirs is your own nakedness.
"'You shall not uncover the nakedness of your daughter-in-law: she is your son's wife. You shall not uncover her nakedness.
"'If a man lies with his daughter-in-law, both of them shall surely be put to death: they have committed a perversion; their blood shall be upon them.
Then Judah said to Tamar, his daughter-in-law, "Remain a widow in your father's house, until Shelah, my son, is grown up;" for he said, "Lest he also die, like his brothers." Tamar went and lived in her father's house.
He turned to her by the way, and said, "Please come, let me come in to you," for he didn't know that she was his daughter-in-law. She said, "What will you give me, that you may come in to me?"
1 Chronicles 2:4
Tamar his daughter-in-law bore him Perez and Zerah. All the sons of Judah were five.
Then she arose with her daughters-in-law, that she might return from the country of Moab: for she had heard in the country of Moab how that Yahweh had visited his people in giving them bread.
She went forth out of the place where she was, and her two daughters-in-law with her; and they went on the way to return to the land of Judah.
He shall be to you a restorer of life, and sustain you in your old age, for your daughter-in-law, who loves you, who is better to you than seven sons, has borne him."
1 Samuel 4:19
His daughter-in-law, Phinehas' wife, was with child, near to be delivered. When she heard the news that the ark of God was taken, and that her father-in-law and her husband were dead, she bowed herself and brought forth; for her pains came on her.
For the son dishonors the father, the daughter rises up against her mother, the daughter-in-law against her mother-in-law; a man's enemies are the men of his own house.
For I came to set a man at odds against his father, and a daughter against her mother, and a daughter-in-law against her mother-in-law.
They will be divided, father against son, and son against father; mother against daughter, and daughter against her mother; mother-in-law against her daughter-in-law, and daughter-in-law against her mother-in-law."