Midrasz do Rodzaju 26:30

And it came to pass in those days, after the days of Abraham, that the Lord brought, in the ‎same year, a very heavy famine upon the earth; and when the famine was in the land of ‎Canaan, Isaac arose to go down unto the land of Egypt on account of the famine, as Abraham, ‎his father, once did. And in that night the Lord appeared unto Isaac, saying: Do not go down to ‎Egypt; arise and go unto Gerar, to Abimelech, the king of the Philistines, and remain there until ‎the famine is over. And Isaac arose and went to Gerar, according to the command of the Lord, ‎and he tarried there a whole year. And when Isaac came to Gerar the inhabitants of the land ‎saw Rebekah, his wife, and behold she was very beautiful in appearance. And the people of ‎Gerar made inquiries of Isaac concerning his wife, and he said: She is my sister, for he was ‎afraid to acknowledge her as his wife, lest the people of the land might slay him on her ‎account. And the princes of Abimelech went and praised the woman to the king, yet he made ‎no reply, nor did he listen unto their words. And when he heard them say that Isaac ‎proclaimed her to be his sister, the king kept that within himself. And when Isaac had dwelt in ‎the land for three months, Abimelech looked out through the window and behold Isaac was ‎very affectionate to Rebekah, his wife; for Isaac dwelt in one of the king's out-houses, which ‎was opposite to the king's own house. And the king said unto Isaac: What is this thou hast ‎done unto us? one of the people might lightly have come near thy wife and thou shouldest ‎have brought guiltiness upon us. And Isaac replied unto Abimelech: Because I was in fear lest I ‎die for her, therefore I proclaimed her to be my sister. And at that time Abimelech charged all ‎his princes and nobles to take Isaac and his wife Rebekah, and to bring them unto the ‎presence of the king. And the king gave orders to dress them in royal garments, and cause ‎them to ride through the streets of the city, and to call out before them: This is the husband ‎and this is his wife, and whosoever will touch this man or his wife shall surely be put to death. ‎And Isaac returned unto the king's house, and the Lord was with Isaac and he continued to ‎grow in greatness, and he lacked nothing. And the Lord caused Isaac to find favor in the eyes ‎of the king and in the eyes of all his servants, and Abimelech did well with Isaac, for Abimelech ‎well remembered the covenant which was cut between his father and Abraham. And ‎Abimelech said unto Isaac: Behold the entire land is before thee, dwell wherever it seemeth ‎good in thine eyes until thou returneth unto thy land. And Abimelech gave unto Isaac fields ‎and vineyards and the best land of Gerar, to sow and to reap and to eat of the fruit of the ‎ground until the famine should cease.