Genesis 20

Abraham journeyed from thence ... and dwelled between Kadesh and Shur--Leaving the encampment, he migrated to the southern border of Canaan. In the neighborhood of Gerar was a very rich and well-watered pasture land.

Abraham said of Sarah his wife, She is my sister--Fear of the people among whom he was, tempted him to equivocate. His conduct was highly culpable. It was deceit, deliberate and premeditated--there was no sudden pressure upon him--it was the second offense of the kind [see on Ge 12:13]--it was a distrust of God every way surprising, and it was calculated to produce injurious effects on the heathen around. Its mischievous tendency was not long in being developed. Abimelech (father-king) ... sent and took Sarah--to be one of his wives, in the exercise of a privilege claimed by Eastern sovereigns, already explained (see on Ge 12:15).

But God came to Abimelech in a dream--In early times a dream was often made the medium of communicating important truths; and this method was adopted for the preservation of Sarah.

Then Abimelech called Abraham, and said ... What hast thou done?--In what a humiliating plight does the patriarch now appear--he, a servant of the true God, rebuked by a heathen prince. Who would not rather be in the place of Abimelech than of the honored but sadly offending patriarch! What a dignified attitude is that of the king--calmly and justly reproving the sin of the patriarch, but respecting his person and heaping coals of fire on his head by the liberal presents made to him.

And Abraham said ... I thought, Surely the fear of God is not in this place--From the horrible vices of Sodom he seems to have taken up the impression that all other cities of Canaan were equally corrupt. There might have been few or none who feared God, but what a sad thing when men of the world show a higher sense of honor and a greater abhorrence of crimes than a true worshipper!

yet indeed she is my sister--(See on Ge 11:31). What a poor defense Abraham made. The statement absolved him from the charge of direct and absolute falsehood, but he had told a moral untruth because there was an intention to deceive (compare Ge 12:11-13). "Honesty is always the best policy." Abraham's life would have been as well protected without the fraud as with it: and what shame to himself, what distrust to God, what dishonor to religion might have been prevented! "Let us speak truth every man to his neighbor" [Zec 8:16; Eph 4:25].

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.

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.

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.