Genesis 38:27

About three months later, Judah was told, “Tamar, your daughter-in-law, has played the prostitute. Moreover, behold, she is with child by prostitution.”

Judah said, “Bring her out, and let her be burned.”

When she was brought out, she sent to her father-in-law, saying, “I am with child by the man who owns these.” She also said, “Please discern whose these are—the signet, and the cords, and the staff.”

Judah acknowledged them, and said, “She is more righteous than I, because I didn’t give her to Shelah, my son.”

He knew her again no more.

When she travailed, one put out a hand, and the midwife took and tied a scarlet thread on his hand, saying, “This came out first.”

As he drew back his hand, behold, his brother came out, and she said, “Why have you made a breach for yourself?” Therefore his name was called Perez.

Afterward his brother came out, who had the scarlet thread on his hand, and his name was called Zerah.