Rizpah (‘coal’; ‘hot stone’) was the daughter of Aiah and one of Saul's concubines.

"A famine, which lasted for three years, fell upon the land during the first half of King David's reign. This calamity was sent ‘for Saul and for his bloody house, because he slew the Gibeonites.’ David inquired of them what satisfaction they demanded and was answered that nothing would compensate for the wrong Saul had done but the death of seven of Saul's sons. David accordingly delivered up the two sons of Rizpah and five sons of Merab, Saul's daughter. The Gibeonites put them to death and hung up their bodies at the sanctuary at Gibeah. Rizpah thereupon took her place on the rock of Gibeah, and for five months watched the suspended bodies of her children, to prevent them from being devoured by beasts and birds of prey, till they were at length taken down and buried by David."

Edited extract from 'Easton's Bible Dictionary'