Genesis 38:27

27.Behold twins were in her womb. Although both Judah obtained pardon for his error, and Tamar for her wicked contrivance; yet the Lord, in order to humble them, caused a prodigy to take place in the birth. Something similar had before happened in the case of Jacob and Esau, but for a different reason: as we know that prodigies sometimes portend good, sometimes evil. Here, however, there is no doubt that the twins, in their very birth, bring with them marks of their parents’ infamy. For it was both profitable to themselves that the memory of their shame should be renewed, and it served as a public example, that such a crime should be branded with eternal disgrace. There is an ambiguity in the meaning of the midwife’s words. Some suppose the “breaking forth” to apply to the membrane of the womb, (143) which is broken when the foetus comes forth. Others more correctly suppose, that the midwife wondered how Pharez, having broken through the barrier interposed, should have come out first; for his brother, who had preceded him, was, as an intervening wall, opposed to him. To some the expression appears to be an imprecation; as if it had been said, “Let the blame of the rupture be upon thee.” But Moses, so far as I can judge, intends to point out nothing more, than that a prodigy took place at the birth.