Genesis 20:8-13

8Early the next morning, Abimelech called together his officers. He told them what had happened. When the officers heard about it, they were very afraid.

9Abimelech called Abraham to come to him. He said to Abraham, ‘Why have you done this bad thing against us? I have not done anything wrong against you. Now you have made me and the people in my kingdom guilty of a very bad thing. Nobody should ever do the things that you have done to me.’

10Abimelech asked Abraham, ‘What caused you to do this?’

11Abraham replied, ‘I did it because I was afraid. I thought, “The people here do not respect God. They will kill me so that they can take my wife from me.”

12And also, she really is my sister. She is the daughter of my father. But she is not the daughter of my mother. And she became my wife.

13God told me to leave my father's house and to travel. At that time I said to Sarah, “This is how you can show that you love me. Everywhere we go, tell people that I am your brother.” ’