A type of sale (ba’i), prevalent in pre-Islamic times, in which the object of sale was determined as the one on which a pebble or stone, thrown by a potential buyer, falls. In other words, the contract of sale was entered into by the buyer throwing a pebble or stone (hasah or hasat) towards the goods in question (such as clothes, camels, sheep, etc), with the one hit by the pebble being picked up as the actual object of sale. By this action, the contract was confirmed and the two parties were under obligation to exchange the object hit by the pebble. Shari’a prohibits this sale (also known as ba’i al-hasat) due to the amount of gharar it is associated with.

Ba’i ilqa’ al-hajar is an Arabic term that translates into sale by means of pebbles (or simply as pebble sale).

The person in charge of bayt al-mal was known as sahib bayt al-mal (صاحب بيت المال).