This chapter gives an account of the conception, birth, circumcision, and weaning of Isaac, Ge 21:1-8; of the mocking of Ishmael, and of the casting out of him and his mother from Abraham's house, at the request of Sarah, which, though grievous to Abraham, he complied with at the direction of God, Ge 21:9-13; of the provision Abraham made for their departure, and of the supply they met with in the wilderness from God, where Ishmael was brought up, and where he married, Ge 21:14-21; and of a covenant between Abraham and Abimelech, king of Gerar, Ge 21:22-32; and of Abraham's planting a grove, and calling on the name of the Lord, Ge 21:33; and the chapter is closed with this observation, that Abraham sojourned in the land of the Philistines many days, Ge 21:34.