Anyone who buys food according to a Salam sale, or another type of contract, is not permitted to sell it before receiving it by measuring or weighing it and taking possession of it in their store, because the Prophet (peace be upon him)
the selling of food before receiving it.
Delivering wheat to a silo is considered as a sale to the government. Therefore, it is not permissible to sell the food before receiving it and having full possession of it. And Allah knows best. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.