Mas’ala 5845الأمShafi'ivol. 2, p. 135vol. 2, p. 135 فَإِذَا لَمْ يَقُلْ هَذَا فَالْإِجَارَةُ مَجْهُولَةٌ، Read the whole chapterCopy with source On the map: Hire and rewardCompare