Genesis 40:1-3, 14, 23

And it came to pass after these things, that the butler of the king of Egypt and his baker had offended their lord the king of Egypt. 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.

But think on me when it shall be well with thee, and shew kindness, I pray thee, unto me, and make mention of me unto Pharaoh, and bring me out of this house

Yet did not the chief butler remember Joseph, but forgat him.