Attend therefore to what I say. The marriages of Jacob were types of that which Christ was about to accomplish. For it was not lawful for Jacob to marry two sisters at once. And he serves Laban for [one of] the daughters; and being deceived in [the obtaining of] the younger, he again served seven years. Now Leah is your people and synagogue; but Rachel is our Church. And for these, and for the servants in both, Christ even now serves.
Justin Martyr: Dialogue of Justin, Philosopher and Martyr, with Trypho, a Jew part 13