Then Rizpah the daughter of Aiah took sackcloth and spread it for herself on the rock, from the beginning of harvest until rain fell upon them from the heavens. And she did not allow the birds of the air to come upon them by day, or the beasts of the field by night.
Here we have, I. Saul's sons not only hanged, but hanged in chains, their dead bodies left hanging, and exposed, till the judgment ceased, which their death was to turn away, by the sending of rain upon the land. They died as sacrifices, and thus they were, in a manner, offered up, not consumed all at once by fire, but gradually by the air.
Commenting on 2 Samuel 21:10-14
And Rizpah the daughter of Aiah took sackcloth,.... Both as a token of mourning for her sons, and as fittest to defend from the weather, the heat by day of cold by night: and spread it for her upon the rock; the hill on which her sons were hanged; this she spread as a canopy or tent to sit under, and be covered with it...
RIZPAH'S KINDNESS UNTO THE DEAD. (Sa2 21:10-11) Rizpah . . . took sackcloth, and spread it for her upon the rock--She erected a tent near the spot, in which she and her servants kept watch, as the relatives of executed persons were wont to do, day and night, to scare the birds and beasts of prey away from the remains exposed on the low-standing gibbets.