Verses 1–7
GENESIS - CHAPTER TWENTY
Verses 1-7:
The Scriptures do not reveal Abraham’s reason for leaving the Plains of Mamre to journey southward. It may have been because he wished to leave the vicinity of the terrible scene he had witnessed in Sodom’s destruction. The region to which he traveled was between Kadesh and Shur, in the southern region of Palestine, near the site of Beersheba. The name of the region was Gerar.
Abraham sought to perpetuate the same deceit he had practiced in Egypt, years before (see Ge 12:13). He who was the "Father of the Faithful" was guilty of a severe breach of faith.
"Abimelech" is not a proper name, but a title, "father king." He was the king of Gerar. When Abraham arrived in his country, it was obvious that he was man of great wealth. He had huge herds of livestock. And he maintained a private army of over three hundred soldiers. An alliance with so wealthy and powerful a chieftain would be very advantageous. A propitious means of arranging such an alliance would be marriage. Since Abraham had told Abimelech Sarah was his sister, the king saw nothing wrong with taking her into his harem, doubtless intending to marry her at the earliest opportunity.
Sarah at this time was past ninety years of age. It is strange to modern thought that a woman of this age would be a prime target for marriage!
Abimelech was evidently restrained by Divine intervention from consummating any marriage with Sarah. The language implies that he was stricken with a malady of some sort that made the marriage impossible for a time. He did not have sexual relations with Sarah at any time. It is absolutely necessary that the Divine record include this notice, lest some should say that Abimelech was the father of Isaac who would yet be born.
Abimelech feared and recognized Jehovah as God. God revealed to him in a dream that the new addition to his harem was in reality the wife of another man. This frightened Abimelech. He disclaimed any knowledge of this, and affirmed his innocence of any immorality. God instructed him to restore Sarah to Abraham, for he was a prophet. None should harm a prophet nor any of his household.