The nature of the contract with a merchant who has a small amount of goods in stock and will bring the rest from the factory

Question : It was detailed for you, and she said to Shaykh Abu Malik, and I say that the Prophet (peace and blessings be upon him) coughed on behalf of our Lord Abu Malik, regarding a matter that occurs among merchants. For example, a customer comes and asks the seller for a specific item in a large quantity, say one hundred cartons of this type, but the seller only has ten cartons, so he is forced to go to the factory to get the required quantity. The buyer is in one of these situations: either he pays the value of the goods before they are brought, or he gives them a down payment, or the seller brings them based on trust.

Answer : That is, in such a case, the contract is made on the weighed goods. The rest is a contract on what is in the debt, like a salam. It is said that the contract on what is present is made on it according to what they agree upon, and that becomes a loan where the buyer pays the price and says, for example, this is one thousand riyals for one thousand cartons to be brought after one month or two months, according to what they agree upon.