10 Therefore she said to Abraham, "Cast out this handmaid and her son! For the son of this handmaid will not be heir with my son, Isaac."
*Minor differences ignored. Grouped by changes, with first version listed as example.
Cast out this bondwoman. Not only is Sarah exasperated against the transgressor, but she seems to act more imperiously towards her husband than was becoming in a modest wife. Peter shows, that when, on a previous occasion, she called Abraham lord, she did not do so feignedly; since he proposes her, as an example of voluntary subjection, to pious and chaste matrons. (1-Peter 3:6.) But now, she not only usurps the government of the house, by calling her husband to order, but commands him whom she ought to reverence, to be obedient to her will. Here, although I do not deny that Sarah, being moved by womanly feelings, exceeded the bounds of moderation, I yet do not doubt, both that her tongue and mind were governed by a secret impulse of the Spirit, and that this whole affair was directed by the providence of God. Without controversy, she was the minister of great and tremendous judgment. And Paul adduces this expression, not as a futile reproach, which an enraged woman had poured forth, but as a celestial oracle. But although she sustains a higher character than that of a private woman, yet she does not take from her husband his power; but makes him the lawful director of the ejection.
Cast out this bondwoman and her son - Both Sarah and Abraham have been accused of cruelty in this transaction, because every word reads harsh to us. Cast out; גרש garash signifies not only to thrust out, drive away, and expel, but also to divorce; (see Leviticus 21:7); and it is in this latter sense the word should be understood here. The child of Abraham by Hagar might be considered as having a right at least to a part of the inheritance; and as it was sufficiently known to Sarah that God had designed that the succession should be established in the line of Isaac, she wished Abraham to divorce Hagar, or to perform some sort of legal act by which Ishmael might be excluded from all claim on the inheritance.
Wherefore she said unto Abraham, cast out this bondwoman and her son,.... Hagar, Sarah's handmaid and bondservant, and her son Ishmael; by this it appears that Hagar was concerned in this affair, and set her son on to mock Isaac, at least she encouraged him in it, buoying: him up with his being the firstborn, and having a right to the inheritance; wherefore Sarah saw plainly that there would be no peace nor comfort for her and her son, unless Hagar and her son were turned out of doors, for which she moves Abraham; and this not merely in a passion, but by divine direction and influence, as is evident from God's approbation of it:
for the son of this bondwoman shall not be heir with my son, even with Isaac; which he would seem to be, if continued, and would think himself so, and there would be continual bickerings about it; wherefore, to put it out of all doubt who was heir, she desires that he and his mother both might be cast out of the house, which would be a clear determination of this matter. Sarah may seem to take upon her too much, to be so peremptory, as to declare who should, and who should not be heir, which more properly belonged to Abraham, whom she called her lord, Genesis 18:12; but what will sufficiently free her from any charge of this kind is the revelation of the divine will, and the promise of God that so it should be; namely, that the covenant God had so often renewed with Abraham should be established with Isaac, and not with Ishmael, Genesis 17:19. Now what was the design of God, in guiding Sarah to make such a motion as this to Abraham, is taught us by the Apostle Paul, who makes these two women to be types and figures of the two covenants, and their sons of those that are under them, see Galatians 4:22.
Wherefore she said unto Abraham, Cast out this bondwoman--Nothing but the expulsion of both could now preserve harmony in the household. Abraham's perplexity was relieved by an announcement of the divine will, which in everything, however painful to flesh and blood, all who fear God and are walking in His ways will, like him, promptly obey. This story, as the apostle tells us, in "an allegory" [Galatians 4:24], and the "persecution" by the son of the Egyptian was the commencement of the four hundred years' affliction of Abraham's seed by the Egyptians.
Cast out the bond - woman - This was a type of the rejection of the unbelieving Jews, who, though they were the seed of Abraham, yet, because they submitted not to the gospel - covenant, were unchurched and disfranchised. And that, which above any thing provoked God to cast them off, was, their mocking and persecuting the gospel - church, God's Isaac, in his infancy.
*More commentary available at chapter level.