The World Federation One Stop Fiqh

Ruling 2239

It is not necessary that the property being offered be specified with all its particulars; rather, it is sufficient if it is understood by the worker, such that him taking steps to perform the task would not be considered foolish. For example, if the offeror says, ‘For whatever amount above £100 you sell this property, the extra is for you’, the reward is valid. Similarly, if he says, ‘Whoever finds my horse, I will give him half of its value or 10 kilograms of wheat’, again the reward is valid.