Genesis 20:1-3

Now Abraham journeyed from there toward the Negev (the South country), and settled between Kadesh and Shur; then he lived temporarily in Gerar. Abraham said [again] of Sarah his wife, “She is my sister.” So Abimelech king of Gerar sent and took Sarah [into his harem]. But God came to Abimelech in a dream during the night, and said, “Behold, you are a dead man because of the woman whom you have taken [as your wife], for she is another man’s wife.”