Genesis 38:28-30

28While she was giving birth, one stuck out his hand, and the midwife took a scarlet thread and tied it to his hand saying, “This one came out first.”

29But as he was pulling his hand back in, behold, his brother came out. So she said, “How you have broken through! The breach is because of you.” And he named him Perez.

30Afterward his brother, on whose hand was the scarlet thread, came out. And he named him Zerah.