Genesis 12:13

And Abraham said of Sarah his wife, “She is my sister.” So Abimelech king of Gerar sent and took Sarah.

and it happened when God caused me to wander from my father’s house, that I said to her, ‘This is the lovingkindness which you will show to me: everywhere we go, say of me, “He is my brother.”’”

Then the men of the place asked about his wife. And he said, “She is my sister,” for he was afraid to say, “my wife,” thinking, “lest the men of the place kill me on account of Rebekah, for she is beautiful in appearance.”