Genesis 38:26-28

Young's Literal Translation

²⁶ And Judah discerneth and saith, `She hath been more righteous than I, because that I did not give her to Shelah my son;' and he hath not added to know her again.

²⁷ And it cometh to pass in the time of her bearing, that lo, twins [are] in her womb;

²⁸ and it cometh to pass in her bearing, that [one] giveth out a hand, and the midwife taketh and bindeth on his hand a scarlet thread, saying, `This hath come out first.'