What is the ruling regarding selling fruit for two years in advance?
Chapter on Guaranteed Salaf (Advance Payment) for a Specified Term
Al-Mughni
Book of Sales
Primary text
Selling fruit for two years in advance is permissible, provided the measure, weight, and term are clearly specified. The evidence is the Prophet's concession to the people of Medina practicing salam for one or two years. The fact that the Prophet did not forbid this implicitly validates it.
Supporting text
If the existence of the subject matter at the time of contracting were a condition, then a two-year advance sale would be forbidden because it necessitates the subject matter being non-existent during part of the period.