In this chapter we have, I. Isaac, the child of promise born into Abraham’s family, Gen. 21:1-8. II. Ishmael, the son of the bondwoman, cast out of it, Gen. 21:9-21. III. Abraham’s league with his neighbour Abimelech, Gen. 21:23-32. IV. His devotion to his God, Gen. 21:33.
Long-looked-for comes at last. The vision concerning the promised seed is for an appointed time, and now, at the end, it speaks, and does not lie.