And Abraham sojourned in Gerar Which belonged to the Philistines. We are not told upon what occasion he removed; whether terrified by the destruction of Sodom, or, as some of the Jewish writers say, because he was grieved at Lot's incest with his daughters, and the reproach which the Canaanites cast upon him for his kinsman's sake. The king of Gerar sent and took her To his house, in order to the taking of her to his bed.
Related Commentaries of Genesis 20:1
Genesis 20:1-2
1 And Abraham journeyed from thence toward the south country, and dwelled between Kadesh and Shur, and sojourned in Gerar.
2 And Abraham said of Sarah his wife, She is my sister: and Abimelech king of Gerar sent, and took Sarah.