Genesis 38:8, 11, 26

Then Judah said to Onan, “Go in to your brother’s wife and perform the duty of a brother-in-law to her, and raise up offspring for your brother.”

Then Judah said to Tamar his daughter-in-law, “Remain a widow in your father’s house, till Shelah my son grows up”—for he feared that he would die, like his brothers. So Tamar went and remained in her father’s house.

Then Judah identified them and said, “She is more righteous than I, since I did not give her to my son Shelah.” And he did not know her again.