Genesis:38:28-29
vw@Genesis:38:28 @ And so it was, when she was giving birth, that the one put out his hand; and the midwife took a scarlet thread and tied it on his hand, saying, This one came out first.
vw@Genesis:38:29 @ And it happened, as he drew back his hand, that his brother came forth; and she said, How have you broken through this breach for yourself? Therefore his name was called Perez.