Genesis 12:10-13

Abram in Egypt 10Now there was a famine in the land, and Abram went down to Egypt to live there for a while because the famine was severe. 11As he was about to enter Egypt, he said to his wife Sarai, “I know what a beautiful woman you are. 12When the Egyptians see you, they will say, ‘This is his wife.’ Then they will kill me but will let you live.

13Say you are my sister, so that I will be treated well for your sake and my life will be spared because of you.”