Genesis 12:10-13

At that time a severe famine struck the land of Canaan, forcing Abram to go down to Egypt, where he lived as a foreigner. As he was approaching the border of Egypt, Abram said to his wife, Sarai, “Look, you are a very beautiful woman. When the Egyptians see you, they will say, ‘This is his wife. Let’s kill him; then we can have her!’ So please tell them you are my sister. Then they will spare my life and treat me well because of their interest in you.”