Gen 21:15 And the water was spent in the bottle, and she cast the child under one of the shrubs. 16 And she went, and sat her down over against him a good way off, as it were a bowshot: for she said, Let me not see the death of the child. And she sat over against him, and lift up her voice, and wept.
Gen 21:20 And God was with the lad; and he grew, and dwelt in the wilderness, and became an archer.
Both mom and child wept. But it was the voice of the lad that got heaven's attention.
I find it interesting that:
1. Hagar threw her little boy under the bushes ("cast"). He was old enough to mock his little half-brother at his birthday party, but not old enough to care for himself. I would imagine, about 3 or 4.
2. She removed herself about a bow shot away so she couldn't hear his cries. I would estimate that to be anywhere between 50 and 100 yards. Ironically, he became adept as an archer (20). Only God...!!! Of course, his grandkids would leave of the use of the bow and prefer RPGs and AKs.
3. As foretold by God, he (his prodigy) would become a wild man: his hand will be against every man, and every man's hand against him; and he shall dwell in the presence of all his brethren. (see Islam)