Philo Judaeus De Cherubim 46

[46] And he teaches the same lesson more plainly in the case of Leah, where he says that "God opened her womb." ¹ But to open the womb is the especial business of the husband. And she having conceived, brought forth, not to God, for he alone is sufficient and all-abundant for himself, but to him who underwent labour for the sake of that which is good, namely, for Jacob; so that in this instance virtue received the divine seed from the great Cause of all things, but brought forth her offspring to one of her lovers, who deserved to be preferred to all her other suitors. ^{2 3 4 5}