After Potiphar's wife falsely accused Joseph, what did Potiphar do to him?

Answer: Threw him into prison

Burning with anger, Potiphar had Joseph thrown into the prison where the king's prisoners were confined.

“When his master heard the story his wife told him, saying, “This is what your slave did to me,” he burned with anger. So Joseph’s master took him and had him thrown into the prison where the king’s prisoners were confined. While Joseph was there in the prison,”— Genesis 39:19-20 (BSB)