Genesis 40:1-3, 14, 23

Some time later, the cupbearer and the baker of the king of Egypt offended their master, the king of Egypt. Pharaoh was angry with his two officials, the chief cupbearer and the chief baker, and put them in custody in the house of the captain of the guard, in the same prison where Joseph was confined.

But when all goes well with you, remember me and show me kindness; mention me to Pharaoh and get me out of this prison.

The chief cupbearer, however, did not remember Joseph; he forgot him.