Genesis 40:7 (KJV)

And Pharaoh was wroth against two of his officers, against the chief of the butlers, and against the chief of the bakers.

And he put them in ward in the house of the captain of the guard, into the prison, the place where Joseph was bound.

And the captain of the guard charged Joseph with them, and he served them: and they continued a season in ward.

And they dreamed a dream both of them, each man his dream in one night, each man according to the interpretation of his dream, the butler and the baker of the king of Egypt, which were bound in the prison.

And Joseph came in unto them in the morning, and looked upon them, and, behold, they were sad.

And they said unto him, We have dreamed a dream, and there is no interpreter of it. And Joseph said unto them, Do not interpretations belong to God? tell me them, I pray you.

And the chief butler told his dream to Joseph, and said to him, In my dream, behold, a vine was before me;

And in the vine were three branches: and it was as though it budded, and her blossoms shot forth; and the clusters thereof brought forth ripe grapes:

And Pharaoh's cup was in my hand: and I took the grapes, and pressed them into Pharaoh's cup, and I gave the cup into Pharaoh's hand.

And Joseph said unto him, This is the interpretation of it: The three branches are three days: