2 And Abraham said of Sarah his wife, She is my sister. And Abimelech the king of Gerar sent and took Sarah.

3 But God came to Abimelech in a dream by night, and said to him, Behold, thou art [but] a dead man, because of the woman that thou hast taken; for she is a man's wife. 4 But Abimelech had not come near her. And he said, Lord, wilt thou also kill a righteous nation? 5 Did he not say to me, She is my sister? and she, even she said, He is my brother. In the integrity of my heart and in the innocency of my hands have I done this. 6 And God said to him in a dream, I also knew that thou didst this in the integrity of thy heart, and I, too, have withheld thee from sinning against me: therefore have I not suffered thee to touch her. 7 And now, restore the man's wife; for he is a prophet, and will pray for thee, that thou mayest live. And if thou do not restore [her], know that thou shalt certainly die, thou and all that is thine.

8 And Abimelech rose early in the morning, and called all his servants, and spoke all these words in their ears; and the men were greatly afraid. 9 And Abimelech called Abraham and said to him, What hast thou done to us? And in what have I sinned against thee, that thou hast brought on me, and on my kingdom, a great sin? Thou hast done to me deeds that ought not to be done. 10 And Abimelech said to Abraham, What hast thou seen that thou hast done this? 11 And Abraham said, Because I said, Surely the fear of God is not in this place, and they will kill me for my wife's sake. 12 But she is also truly my sister, the daughter of my father, but not the daughter of my mother; and she became my wife. 13 And it came to pass when God caused me to wander from my father's house, that I said to her, Let this be thy kindness which thou shalt shew to me: at every place whither we shall come, say of me, He is my brother.

14 And Abimelech took sheep and oxen, and bondmen and bondwomen, and gave [them] to Abraham, and restored him Sarah his wife. 15 And Abimelech said, Behold, my land is before thee: dwell where it is good in thine eyes. 16 And to Sarah he said, Behold, I have given thy brother a thousand [pieces] of silver; behold, let that be to thee a covering of the eyes, in respect of all that are with thee, and with all; and she was reproved. 17 And Abraham prayed to God, and God healed Abimelech, and his wife and his handmaids, and they bore [children]. 18 For Jehovah had fast closed up all the wombs of the house of Abimelech because of Sarah Abraham's wife.

Matthew Henry's Commentary on Genesis 20:2-18

Commentary on Genesis 20:1-8

(Read Genesis 20:1-8)

Crooked policy will not prosper: it brings ourselves and others into danger. God gives Abimelech notice of his danger of sin, and his danger of death for his sin. Every wilful sinner is a dead man, but Abimelech pleads ignorance. If our consciences witness, that, however we may have been cheated into a snare, we have not knowingly sinned against God, it will be our rejoicing in the day of evil. It is matter of comfort to those who are honest, that God knows their honesty, and will acknowledge it. It is a great mercy to be hindered from committing sin; of this God must have the glory. But if we have ignorantly done wrong, that will not excuse us, if we knowingly persist in it. He that does wrong, whoever he is, prince or peasant, shall certainly receive for the wrong which he has done, unless he repent, and, if possible, make restitution.

Commentary on Genesis 20:9-13

(Read Genesis 20:9-13)

See here much to blame, even in the father of the faithful. Mark his distrust of God, his undue care about life, his intent to deceive. He also threw temptation in the way of others, caused affliction to them, exposed himself and Sarah to just rebukes, and yet attempted an excuse. These things are written for our warning, not for us to imitate. Even Abraham hath not whereof to glory. He cannot be justified by his works, but must be indebted for justification, to that righteousness which is upon all and unto all them that believe. We must not condemn all as hypocrites who fall into sin, if they do not continue in it. But let the unhumbled and impenitent take heed that they do not sin on, thinking that grace may abound. Abimelech, being warned of God, takes the warning; and being truly afraid of sin and its consequences, he rose early to pursue the directions given him.

Commentary on Genesis 20:14-18

(Read Genesis 20:14-18)

We often trouble ourselves, and even are led into temptation and sin, by groundless suspicions; and find the fear of God where we expected it not. Agreements to deceive generally end in shame and sorrow; and restraints from sin, though by suffering, should be thankfully acknowledged. Though the Lord rebuke, yet he will pardon and deliver his people, and he will give them favour in the sight of those with whom they sojourn; and overrule their infirmities, when they are humbled for them, so that they shall prove useful to themselves and others.