And God said unto him in a dream,.... The same dream continued:

yea, or "also"

I know that thou didst this in the integrity of thy heart; not only thou knowest, but I, who know all things, know and acknowledge that this was so done by thee. Abimelech's plea is admitted, and a very great testimony borne to his integrity in this matter; and throughout the whole account he appears to be a man of great honour and uprightness, especially in this affair, if not a good man:

for I also withheld thee from sinning against me; for had he committed adultery with her, it had been not only a sin against her, and against her husband, but against God being contrary to his will revealed in the minds of men by the law and light of nature, before the law of Moses was given: and indeed all sin against the neighbour is ultimately against God, see Psalm 51:4; and now from the commission of this sin God restrained Abimelech, either by some impulse upon his mind not to take her to be his wife as yet, or by throwing some thing or other in the way of it, in his providence, or by inflicting some disease upon him, which rendered him incapable of it, Genesis 20:17,

therefore suffered I thee not to touch her; that is, to have carnal knowledge of her, see 1 Corinthians 7:1; as there is nothing done but what is done by divine permission, so many more evils would be committed than there are, were it not that men are restrained from them by the power and providence of God, not suffering them to do them; and in particular this sin was prevented, that it might not in any respect be a doubtful point whether Isaac, whom Sarah had now conceived, was a legitimate son of Abraham; and these expressions of Abimelech not coming near her, Genesis 20:4; and not touching her as here, are used for that purpose.

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..

20:6 I withheld thee from sinning against me - It is God that restrains men from doing the ill they would do; it is not from him that there is sin, but it is from him that there is not more sin, either by his influence on mens minds checking their inclination to sin, or by his providence taking away the opportunity. It is a great mercy to be hindered from committing sin, which God must have the glory of whoever is the instrument.

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.