Genesis 38:27-30

27It came about at the time she was giving birth, that behold, there were 1twins in her womb.

28Moreover, it took place while she was giving birth, one put out a hand, and the midwife took and tied a scarlet thread on his hand, saying, “This one came out first.”

29But it came about as he drew back his hand, that behold, his brother came out. Then she said, “What a breach you have made for yourself!” So he was named 23Perez.

30Afterward his brother came out who had the scarlet thread on his hand; and he was named 45Zerah.