Muhammad bin 'Isa bin Hyan محمد بن عيسى بن حيان · Wages (Kitab Al-Ijarah)

A man paid in advance for a palm-tree. It did not bear fruit that year. They brought their case for decision to the Prophet (ﷺ). He said: for which do you make his property lawful? He then said: Do not pay in advance for a palm-tree till they (the fruits) were clearly in good condition.