And Joseph said to him, This is the end of the interpretations of the dream. The three branches are the three Fathers of the world, Abraham, Izhak, and Jakob, the children of whose sons are to be enslaved in Mizraim in clay and brick (work,) and in all labour of the face of the field: but afterwards shall the be delivered by the hand of three shepherds. As thou hast said, I took the grapes and expressed them into Pharoh's cup, and gave the cup Into Pharoh's hand: It is the vial of wrath which Paroh (himself) is to drink at the last. But thou, the chief butler shalt receive a good reward concerning the good dream which thou hast dreamed; and the interpretation of it, to thyself, is this: The three branches are three days until thy liberation.
The Butler's Three Vines as the Three Patriarchs
Targum Pseudo-Jonathan on Genesis 40:12