Genesis 21:14

14.And Abraham rose up early. How painful was the wound, which the ejection of his firstborn son inflicted upon the mind of the holy man, we may gather from the double consolation with which God mitigated his grief: He sends his son into banishments just as if he were tearing out his own bowels. But being accustomed to obey God, he brings into subjection the paternal love, which he is not able wholly to cast aside. This is the true test of faith and piety, when the faithful are so far compelled to deny themselves, that they even resign the very affections of their original nature, which are neither evil nor vicious in themselves, to the will of God. There is no doubt that, during the whole night, he had been tossed with various cares; that he had a variety of internal conflicts, and endured severe torments; yet he arose early in the morning, to hasten his separation from his child; since he knew that it was the will of God.

And took bread, and a bottle of water. Moses intimates not only that Abraham committed his son to the care of his mother, but that he relinquished his own paternal right over him; for it was necessary for this son to be alienated, that he might not afterwards be accounted the seed of Abraham. But with what a slender provision does he endow his wife and her son? He places a flagon of water and bread upon her shoulder. Why does he not, at least, load an ass with a moderate supply of food? Why does he not add one of his servants, of which his house contained plenty, as a companion? Truly either God shut his eyes, that, what he would gladly have done, might not come into his mind; or Abraham limited her provision, in order that she might not go far from his house. For doubtless he would prefer to have them near himself, for the purpose of rendering them such assistance as they would need. Meanwhile, God designed that the banishment of Ishmael should be thus severe and sorrowful; in order that, by his example, he might strike terror into the proud, who, being intoxicated with present gifts, trample under foot, in their haughtiness, the very grace to which they are indebted for all things. Therefore he brought the mother and child to a distressing issue. For after they have wandered into the desert, the water fails; and the mother departs from her son; which was a token of despair. Such was the reward of the pride, by which they had been vainly inflated. It had been their duty humbly to embrace the grace of God offered to all people, in the person of Isaac: but they impiously spurned him whom God had exalted to the highest honor. The knowledge of God’s gifts ought to have formed their minds to modesty. And because nothing was more desirable for them, than to retain some corner in Abraham’s house, they ought not to have shrunk from any kind of subjection, for the sake of so great a benefit: God now exacts from them the punishment, which they had deserved, by their ingratitude.