Genesis 39:8-10

But he refused. “With me in charge,” he told her, “my master does not concern himself with anything in the house; everything he owns he has entrusted to my care. No one is greater in this house than I am. My master has withheld nothing from me except you, because you are his wife. How then could I do such a wicked thing and sin against God?” And though she spoke to Joseph day after day, he refused to go to bed with her or even be with her.