The captain of the guard appointed Joseph to be their attendant, and he served them. They spent some time in custody.

so he imprisoned them in the house of the captain of the guard in the same facility where Joseph was confined.

So he asked Pharaoh’s officials, who were with him in custody in his master’s house, “Why do you look so sad today?”

Pharaoh was enraged with his servants, and he put me in prison in the house of the captain of the guards – me and the chief baker.