Gerar was the capitol of Abimelech, the king of the Philistines
(Gen 12:6ff)
It was located about 20 mile northwest of Beer-sheba.
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Abimelech, the king of Gerar, took Sarah away from Abraham after God intervened in a dream to prevent Abimelech from sinning with her. Abimelech returned Sarah to Abraham and compensated him with gifts.
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It was during famine time.
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I believe that you have a very uncommon problem and should refer
to a professional repair shop.