Genesis 38:25-30

While she was being brought out, she [took the things Judah had given her and] sent [them along with a message] to her father-in-law, saying, “I am with child by the man to whom these articles belong.” And she added, “Please examine [them carefully] and see [clearly] to whom these things belong, the seal and the cord and staff.” Judah recognized the articles, and said, “She has been more righteous [in this matter] than I, because I did not give her to my son Shelah [as I had promised].” And Judah did not have [intimate] relations with her again. Now when the time came for her to give birth, there were twins in her womb. And when she was in labor, one [baby] put out his hand, and the midwife took his hand and tied a scarlet thread on it, saying, “This one was born first.” But he pulled back his hand, and his brother was born first. And she said, “What a breach you have made for yourself [to be the firstborn]!” So he was named Perez (breach, break forth). [Matt 1:3] Afterward his brother who had the scarlet [thread] on his hand was born and was named Zerah (brightness).