Ge 21:2
21:2 For Sarah conceived, and bare Abraham a son in his {a} old
     age, at the set time of which God had spoken to him.

     (a) Therefore the miracle was greater.

Ge 21:7
21:7 And she said, {b} Who would have said unto Abraham, that
     Sarah should have given children suck? for I have born
     [him] a son in his old age.

     (b) She accuses herself of ingratitude, that she did not
         believe the angel.

Ge 21:9
21:9 And Sarah saw the son of Hagar the Egyptian, which she had
     born unto Abraham, {c} mocking.

     (c) He derided God's promise made to Isaac which the
         apostle calls persecution Ga 4:29.

Ge 21:12
21:12 And God said unto Abraham, Let it not be grievous in thy
      sight because of the lad, and because of thy bondwoman; in
      all that Sarah hath said unto thee, hearken unto her
      voice; for in Isaac shall thy seed be {d} called.

      (d) The promised seed will be from Isaac, and not from
          Ishmael, Ro 9:7, He 11:18.

Ge 21:13
21:13 And also of the son of the bondwoman will I make {e} a
      nation, because he [is] thy seed.

      (e) The Ishmaelites will come from him.

Ge 21:14
21:14 And Abraham rose up early in the morning, and took bread,
      and a bottle of water, and gave [it] unto Hagar, putting
      [it] on her shoulder, and the child, and {f} sent her
      away: and she departed, and wandered in the wilderness of
      Beersheba.

      (f) True faith renounces all natural affections to obey
          God's commandment.

Ge 21:17
21:17 And God {g} heard the voice of the lad; and the angel of
      God called to Hagar out of heaven, and said unto her, What
      aileth thee, Hagar?  fear not; for God hath heard the
      voice of the lad where he [is].

      (g) For his promise sake made to Abraham; and not because
          the child had discretion and judgment to pray.

Ge 21:19
21:19 And God {h} opened her eyes, and she saw a well of water;
      and she went, and filled the bottle with water, and gave
      the lad drink.

      (h) Unless God opens our eyes, we can neither see, nor use
          the means which are before us.

Ge 21:20
21:20 And God was {i} with the lad; and he grew, and dwelt in
      the wilderness, and became an archer.

      (i) Concerning outward things God caused him to prosper.

Ge 21:24
21:24 And Abraham said, I will {k} swear.

      (k) So that it is a lawful thing to take an oath in
          matters of importance, to justify the truth, and to
          assure others of our sincerity.

Ge 21:26
21:26 And Abimelech said, {l} I wot not who hath done this
      thing: neither didst thou tell me, neither yet heard I [of
      it], but to day.

      (l) Wicked servants do many evils unknown to their
          masters.

Ge 21:32
21:32 Thus they made a {m} covenant at Beersheba: then Abimelech
      rose up, and Phichol the chief captain of his host, and
      they returned into the land of the Philistines.

      (m) Thus we see that the godly, concerning outward things
          may make peace with the wicked that do not know the
          true God.

Ge 21:33
21:33 And [Abraham] planted a grove in Beersheba, and {n} called
      there on the name of the LORD, the everlasting God.

      (n) That is, he worshipped God in all points of true
          religion.