15 When the water was gone, she left the child under a shrub 16 and went off, fifty yards or so. She said, "I can't watch my son die." As she sat, she broke into sobs. 17 Meanwhile, God heard the boy crying. The angel of God called from Heaven to Hagar, "What's wrong, Hagar? Don't be afraid. God has heard the boy and knows the fix he's in. 18 Up now; go get the boy. Hold him tight. I'm going to make of him a great nation." 19 Just then God opened her eyes. She looked. She saw a well of water. She went to it and filled her canteen and gave the boy a long, cool drink.
Matthew Henry's Commentary on Genesis 21:15-19
Commentary on Genesis 21:14-21
(Read Genesis 21:14-21)
If Hagar and Ishmael had behaved well in Abraham's family, they might have continued there; but they were justly punished. By abusing privileges, we forfeit them. Those who know not when they are well off, will be made to know the worth of mercies by the want of them. They were brought to distress in the wilderness. It is not said that the provisions were spent, or that Abraham sent them away without money. But the water was spent; and having lost their way, in that hot climate Ishmael was soon overcome with fatigue and thirst. God's readiness to help us when we are in trouble, must not slacken, but quicken our endeavours to help ourselves. The promise concerning her son is repeated, as a reason why Hagar should bestir herself to help him. It should engage our care and pains about children and young people, to consider that we know not what great use God has designed them for, and may make of them. The angel directs her to a present supply. Many who have reason to be comforted, go mourning from day to day, because they do not see the reason they have for comfort. There is a well of water near them in the covenant of grace, but they are not aware of it, till the same God that opened their eyes to see their wound, opens them to see their remedy. Paran was a wild place, fit for a wild man; such as Ishmael. Those who are born after the flesh, take up with the wilderness of this world, while the children of the promise aim at the heavenly Canaan, and cannot be at rest till they are there. Yet God was with the lad; his outward welfare was owing to this.