Genesis 20:1
20:1 And Abraham journeyed from thence toward the south country,
     and dwelled between Kadesh and {a} Shur, and sojourned in
     Gerar.

     (a) Which was toward Egypt.

Genesis 20:2
20:2 And Abraham said of Sarah his wife, {b} She [is] my sister:
     and Abimelech king of Gerar sent, and took Sarah.

     (b) Abraham had now twice fallen into this sin: such is
         man's frailty.

Genesis 20:3
20:3 But God came to Abimelech in a dream by night, and said to
     him, Behold, {c} thou [art but] a dead man, for the woman
     which thou hast taken; for she [is] a man's wife.

     (c) So greatly God detests the breach of marriage.

Genesis 20:4
20:4 But Abimelech had not come near her: and he said, Lord,
     wilt thou slay also {d} a righteous nation?

     (d) The infidels confessed that God would not punish but
         for just occasion: therefore, when he punishes, the
         occasion is just.

Genesis 20:5
20:5 Said he not unto me, She [is] my sister? and she, even she
     herself said, He [is] my brother: in the integrity of my
     {e} heart and {f} innocency of my hands have I done this.

     (e) As one falling by ignorance, and not doing evil on
         purpose.
     (f) Not thinking to do any man harm.

Genesis 20:6
20:6 And God said unto him in a dream, Yea, I know that thou
     didst this in the integrity of thy heart; for I also {g}
     withheld thee from sinning against me: therefore suffered I
     thee not to touch her.

     (g) God by his holy Spirit restrains those who offend in
         ignorance, that they not fall into greater offence..

Genesis 20:7
20:7 Now therefore restore the man [his] wife; for he [is] a {h}
     prophet, and he {i} shall pray for thee, and thou shalt
     live: and if thou restore [her] not, know thou that thou
     shalt surely die, thou, and all that [are] thine.

     (h) That is, one to whom God reveals himself familiarly.
     (i) For the prayer of the godly is of force towards God.

Genesis 20:9
20:9 Then Abimelech called Abraham, and said unto him, What hast
     thou done unto us? and what have I offended thee, that thou
     hast brought on me and on my {k} kingdom a great sin? thou
     hast done deeds unto me that ought not to be done.

     (k) The wickedness of the king brings God's wrath on the
         whole realm.

Genesis 20:11
20:11 And Abraham said, Because I thought, Surely the {l} fear
      of God [is] not in this place; and they will slay me for
      my wife's sake.

      (l) He shows that no honesty can be hoped for, where there
          is no fear of God.

Genesis 20:12
20:12 And yet indeed [she is] my {m} sister; she [is] the
      daughter of my father, but not the daughter of my mother;
      and she became my wife.

      (m) By sister, he means his full cousin, and by daughter
          Abraham's niece, Genesis 11:29 for so the Hebrews use
          these words.

Genesis 20:16
20:16 And unto Sarah he said, Behold, I have given thy brother a
      thousand [pieces] of silver: behold, he [is] to thee a {n}
      covering of the eyes, unto all that [are] with thee, and
      with all [other]: {o} thus she was reproved.

      (n) Such a head as with whom you may be preserved from all
          dangers.
      (o) God caused this heathen king to reprove her because
          she concealed her identity, seeing that God had given
          her a husband as her veil and defence.

Genesis 20:18
20:18 For the LORD {p} had fast closed up all the wombs of the
      house of Abimelech, because of Sarah Abraham's wife.

      (p) Had taken away from them the gift of conceiving.