Genesis 20:1-4

Now Abraham journeyed from there toward the land of the Negev, and settled between Kadesh and Shur; then he sojourned in Gerar. Abraham said of Sarah his wife, “She is my sister.” So Abimelech king of Gerar sent and took Sarah. But God came to Abimelech in a dream of the night, and said to him, “Behold, you are a dead man because of the woman whom you have taken, for she is married.” Now Abimelech had not come near her; and he said, “Lord, will You slay a nation, even though blameless?