What is "bisha'a"

Bisha'a or Bisha (ordeal by fire, trial by fire or fire test) is a ritual practiced by Bedouin tribes of the Judean, Negev and Sinai deserts for the purpose of lie detection. It is also practiced, and is said to have originated among, some Bedouin tribes of Saudi Arabia. It is the best-known of various forms of trial by ordeal which are practiced by the Bedouin, which are now dying out. It is one of the rituals in the Bedouin justice dispensary system for maintaining Sharaf - the Bedouin honor code.