Genesis 20:8-13

8Abimelech rose early in the morning, called all his servants and spoke all these words in their ears—and the men were very frightened.

9Then Abimelech called to Abraham and said to him, “What have you done to us, and how have I sinned against you, that you brought great sin upon me and my kingdom? You’ve done to me things that should not be done!”

10Abimelech also said to Abraham, “What motivated you to do this thing?”

11Abraham said, “Because I thought, ‘There is certainly no fear of God in this place, so they’ll kill me, because of my wife.’

12And besides, she really is my sister. She’s my father’s daughter, though not my mother’s daughter. Then she became my wife.

13So when God made me wander away from my father’s house, I said to her, ‘This is your loyalty that you must show me: in every place we go, say of me, ‘He is my brother.’”