Abraham and Sarah go to the Philistine town of Gerar, pretending to be brother and sister (they are half-siblings). The King of Gerar takes Sarah for his wife, but God warns him to return her (as she is really Abraham's wife) and he obeys. God sends Sarah a son and tells her she should name him Isaac; through him will be the establishment of the covenant (promise). Sarah then drives Ishmael and his mother Hagar out into the wilderness (because Ishmael is not her real son and Hagar is a slave), but God saves them and promises to make Ishmael a great nation.
Abraham and Sarah go to the Philistine town of Gerar, pretending to be brother and sister (they are half-siblings). The King of Gerar takes Sarah for his wife, but God warns him to return her (as she is really Abraham's wife) and he obeys. God sends Sarah a son and tells her she should name him Isaac; through him will be the establishment of the covenant (promise). Sarah then drives Ishmael and his mother Hagar out into the wilderness (because Ishmael is not her real son and Hagar is a slave), but God saves them and promises to make Ishmael a great nation.