My Notes
Authors
Jamieson, Fausset, and Brown - Commentary Critical and Explanatory on the Whole Bible
15, 16. As for Sarai … I will … give thee a son also of her—God’s purposes are gradually made known. A son had been long ago promised to Abraham. Now, at length, for the first time he is informed that it was to be a child of Sarai.
Matthew Henry - Commentary on the Whole Bible
Here is, I. The promise made to Abraham of a son by Sarai, that son in whom the promise made to him should be fulfilled, that he should be the father of many nations; for _she also shall be a mother of nations, and kings of people shall be of her, _v. 16. Note, 1. God reveals the purposes of his good-will to his people by degrees. God had told Abraham long before that he should have a son, but never till now that he should have a son by Sarai. 2. The blessing of the Lord makes fruitful, and adds no sorrow with it, no such sorrow as was in Hagar’s case. “I will bless her with the blessing of fruitfulness, and then thou shalt have a son of her.” 3. Civil government and order are a great blessing to the church. It is promised, not only that people, but kings of people, should be of her; not a headless rout, but a well-modelled well-governed society.
II. The ratification of this promise was the change of Sarai’s name into Sarah (v. 15), the same letter being added to her name that was to Abraham’s, and for the same reasons. Sarai signifies my princess, as if her honour were confined to one family only. Sarah signifies a princess—namely, of multitudes, or signifying that from her should come the Messiah the prince, even the prince of the kings of the earth.
III. Abraham’s joyful, thankful, entertainment of this gracious promise, v. 17. Upon this occasion he expressed, 1. Great humility: He fell on his face. Note, The more honours and favours God confers upon us the lower we should be in our own eyes, and the more reverent and submissive before God. 2. Great joy: He laughed. It was a laughter of delight, not of distrust. Note, Even the promises of a holy God, as well as his performances, are the joys of holy souls; there is the joy of faith as well as the joy of fruition. Now it was that Abraham rejoiced to see Christ’s day. Now he saw it and was glad (John viii. 56); for, as he saw heaven in the promise of Canaan, so he saw Christ in the promise of Isaac. 3. Great admiration: Shall a child be born to him that is a hundred years old? He does not here speak of it as at all doubtful (for we are sure that _he staggered not at the promise, _Rom. iv. 20), but as very wonderful and that which could not be effected but by the almighty power of God, and as very kind, and a favour which was the more affecting and obliging for this, that it was extremely surprising, Ps. cxxvi. 1, 2.
IV. Abraham’s prayer for Ishmael: _O that Ishmael might live before thee! _v. 18. This he speaks, not as desiring that Ishmael might be preferred before the son he should have by Sarah; but, dreading lest he should be abandoned and forsaken of God, he puts up this petition on his behalf. Now that God is talking with him he thinks he has a very fair opportunity to speak a good word for Ishmael, and he will not let it slip. Note, 1. Though we ought not to prescribe to God, yet he gives us leave, in prayer, to be humbly free with him, and particular in making known our requests, Phil. iv. 6. Whatever is the matter of our care and fear should be spread before God in prayer. 2. It is the duty of parents to pray for their children, for all their children, as Job, who 114 offered burnt offerings according to the number of them all, Job i. 5. Abraham would not have it thought that, when God promised him a son by Sarah, which he so much desired, then his son by Hagar was forgotten; no, still he bears him upon his heart, and shows a concern for him. The prospect of further favours must not make us unmindful of former favours. 3. The great thing we should desire of God for our children is that they may live before him, that is, that they may be kept in covenant with him, and may have grace to walk before him in their uprightness. Spiritual blessings are the best blessings, and those for which we should be most earnest with God, both for ourselves and others. Those live well that live before God.
V. God’s answer to his prayer; and it is an answer of peace. Abraham could not say that he sought God’s face in vain.
Common blessings are secured to Ishmael (v. 20): As for Ishmael, whom thou art in so much care about, I have heard thee; he shall find favour for thy sake; I have blessed him, that is, I have many blessings in store for him. (1.) His posterity shall be numerous: I will multiply him exceedingly, more than his neighbours. This is the fruit of the blessing, as that, ch. i. 28. (2.) They shall be considerable: Twelve princes shall he beget. We may charitably hope that spiritual blessings also were bestowed upon him, though the visible church was not brought out of his loins and the covenant was not lodged in his family. Note, Great plenty of outward good things is often given to those children of godly parents who are born after the flesh, for their parents’ sake.
Covenant blessings are reserved for Isaac, and appropriated to him, v. 19, 21. If Abraham, in his prayer for Ishmael, meant that he would have the covenant made with him, and the promised seed to come from him, then God did not answer him in the letter, but in that which was equivalent, nay, which was every way better. (1.) God repeats to him the promise of a son by Sarah: She shall bear thee a son indeed. Note, Even true believers need to have God’s promises doubled and repeated to them, that they may have strong consolation, Heb. vi. 18. Again, Children of the promise are children indeed. (2.) He names that child—calls him Isaac, laughter, because Abraham rejoiced in spirit when this son was promised him. Note, If God’s promises be our joy, his mercies promised shall in due time be our exceeding joy. Christ will be laughter to those that look for him; those that now rejoice in hope shall shortly rejoice in having that which they hope for: this is laughter that is not mad. (3.) He entails the covenant upon that child: I will establish my covenant with him. Note, God takes whom he pleases into covenant with himself, according to the good pleasure of his will. See Rom. ix. 8, 18. Thus was the covenant settled between God and Abraham, with its several limitations and remainders, and then the conference ended: God left off talking with him, and the vision disappeared, God went up from Abraham. Note, Our communion with God here is broken and interrupted; in heaven it will be a continual and everlasting feast.
John Calvin - Commentaries
**As for Sarai thy wife God now promises to Abraham a legitimate seed by Sarai. She had been (as I have said) too precipitate, when she substituted, without any command from God, her handmaid in her own place. Abraham also bad been too pliant in following his wife, who foolishly and rashly wished to anticipate the design of God; nevertheless, their united fault did not prevent God from making it known to them that he was about to give them that seed, from the expectation of which, they had, in a manner, cut themselves off. Whence the gratuitous kindness of God shines the more clearly, because, although men impede the course of it by obstacles of their own, it nevertheless comes to them. Moreover, God changes the name of Sarai, in order that he may extend her preeminence far and wide, which in her former name had been more restricted. For the letter י (yod) has the force among the Hebrews of the possessive pronoun: this being now taken away, God designs that Sarah should every where, and without exception, be celebrated as a sovereign and princess.410410 Sarah shall her name be. Heb., שרה, Sarah. Sarai properly signifies “my princess,” as if sustaining that relation to a single individual or to a family. The restriction implied in the possessive “my” is now to be done away: her limited pre-eminence is to be unspeakably enlarged. Thus, instead of “my princess,” she is henceforth to bear an appellation importing “princess of a multitude,” and corresponding with the magnificent promise made to her, ver. 16. — Bush, Notes on Genesis And this is expressed in the context, when God promises that he will give her a son, from whom at length nations and kings should be born. And although at first sight this benediction appears most ample, it is still far richer than it seems to be, in the words here used, as we shall see in a little time.