Genesis 20:1-7

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.” Now Abimelech had not yet come near her; so he said, “Lord, will you kill a people who are righteous and innocent and blameless [regarding Sarah]? Did Abraham not tell me, ‘She is my sister?’ And she herself said, ‘He is my brother.’ In the integrity of my heart and innocence of my hands I have done this.” Then God said to him in the dream, “Yes, I know you did this in the integrity of your heart, for it was I who kept you back and spared you from sinning against Me; therefore I did not give you an opportunity to touch her. So now return the man’s wife, for he is a prophet, and he will pray for you and you will live. But if you do not return her [to him], know that you shall die, you and all who are yours (your household).”