Genesis 40:13
Yet within three days shall Pharaoh lift up thine head, and restore thee unto thy place: and thou shalt deliver Pharaoh’s cup into his hand, after the former manner when thou wast his butler. Yet within three days shall Pharaoh lift up thine head, and restore thee unto thy place: and thou shalt deliver Pharaoh’s cup into his hand, after the former manner when thou wast his butler.
While himself bound in prison, Joseph served the imprisoned chief butler, bringing him food in the morning, noticing his sadness, asking its cause, and declaring that interpretations belong to God before hearing the dream. Within three days Pharaoh would end the butler's imprisonment, release him from prison, and restore him to royal favor and to his former place and office as cupbearer. There he would again deliver the cup into Pharaoh's hand and place the king's cup in his hand as before, after the former manner when he was his butler.
The interpretation came from God through Joseph's kindly interest and help toward one in distress. Hearing it at once relieved the butler's sad and anxious mind and left him grateful and satisfied. The three days form a specified time limiting the predicted restoration, making the verse an example of a predicted event tied to a definite time.
The baker's companion dream likewise concerned an event to occur within the same three days. What was foretold came to pass exactly as predicted, fulfilled as foretold. After his restoration, the butler forgot Joseph still in prison.