Question: where did sarah come from in the bible

title: Sarah
text: After being visited by the three men , Abraham and Sarah settled between Kadesh and Shur in the land of the Philistines . While he was living in Gerar , Abraham again claimed that Sarah was his sister . King Abimelech subsequently had her brought to him . Later , God came to Abimelech in a dream and declared that taking her would result in death because she was a married woman . Abimelech , who had not laid hands on her , inquired if he would also slay a righteous nation , especially since Abraham had claimed that he and Sarah were siblings . In response , God told Abimelech that he did indeed have a blameless heart and that was why he continued to exist . However , if he did not return Sarah to Abraham , God would surely destroy Abimelech and his entire household . Abimelech was informed that Abraham was a prophet who would pray for him .