Genesis 39:20 identifies the same prison where Joseph was kept, confirming the cupbearer’s description of his confinement.

Genesis 40:2 is the original account of Pharaoh’s anger, directly quoted by the cupbearer here. Provides the historical basis.

Genesis 40:3 adds that the prison was where Joseph was confined, expanding the cupbearer’s statement about the house of the captain.

Genesis 37:36 introduces Potiphar as the captain of the guard, the official in whose house the cupbearer was imprisoned.