INTRODUCTION TO GENESIS 17 This chapter treats of a covenant made with Abram, sometimes called the covenant of circumcision, the time when God appeared to him, and promised to make it, and did, Gen 17:1; the particulars of it, both with respect to himself, whose name was now changed, and to his posterity, Gen 17:4; the token of it, circumcision, the time of its performance, and the persons obliged to it, Gen 17:9; the change of Sarai's name, and a promise made that she should have a son, to the great surprise of Abraham, Gen 17:15; a prayer of his for Ishmael, and the answer to it, with a confirmation of Sarah's having a son, whose name should be called Isaac, and the establishment of the covenant with him, Gen 17:18; and the chapter is closed with an account of the circumcision of Abraham, and all his family of the male sort, agreeably to the command of God, Gen 17:23.