Some chapters are just action-packed: Genesis 21 is one of those. This chapter includes the birth of Isaac, the casting out of Ishmael and Hagar, and now a peace treaty between Abraham and Abimelech. You might remember that Abimelech had tried to take Sarah as a bride, only a chapter ago.
This story is a brief return, or perhaps a deliberate contrast, with the Abraham of Genesis 14. In that story, Abraham was a war-lord, a king in all but name. Abraham went to war against a host of Caananite kingdoms to rescue his nephew. Now, he’s suing for peace. Read on.