Abraham tells king Abimelech that Sarah is his sister (Genesis 20:1 - 20:18)

Abraham moved his family, likely in search of better pastures for his herds, to Negev (located between Kadesh and Shur). From there he moved to Gerar where he lived for quite some time. Once again, Abraham and Sarah (his wife) told everyone that Sarah was his sister. Abimelech, the king of Gerar, had the privilege to select whichever woman he wished to add to his collection of wives. Abimelech, thinking that Sarah was not married (because Abraham had told everyone she was his sister), sent for her to add to his concubine.

Abraham tells king Abimelech that Sarah is his sister (Genesis 20:1 - 20:18)