Hazrat Abu Razin says that a man comes to me and says that he needs ghee and oil. I do not have these things. Can I make a deal with him and then have them brought? He replied: No, buy these things and keep them with you, then when he comes, sell them to him.

Hazrat Abdul Malik bin Iyas narrates that Hazrat Amir and Ibrahim were gathered at one place. They were asked: If a person demands goods from another, and the goods are not with him, can he make a deal with him and then procure those goods? Ibrahim considered this matter to be disliked, while Hazrat Amir said that there is no harm in it; if he wishes to abandon the deal later, he may do so.

Hazrat Ata says that if a person wants to buy something from someone which is not known to be in his possession, and both agree upon the price, can he sell it to him? He said: He should buy it before completing the agreement with the other.

Hazrat Saeed bin Musayyib considered the sale of "Muraawadah" as disliked, which is when a person deals in something that he does not possess. He also considered it disliked that a person sees cloth with someone else and asks him if he needs it, then buys it from him only to sell it.

Hazrat Hakam bin Abi Fazl says that I asked Hasan, "A man comes to me and makes a deal with me for such silk which I do not possess, then I buy it from the market and sell it to him. Is this correct?" He replied, "This is 'Muwasafah' and he considered it disliked."

Hazrat Ibn Abi Mulaika narrates that a man bought grain from another man; some of it was in the seller’s possession and some was not. He asked Hazrat Ibn Abbas (may Allah be pleased with them both) and Hazrat Ibn Umar (may Allah be pleased with them both) about this matter. They replied that the sale is permissible for what is in his possession, and the sale is not permissible for what is not in his possession.

Hazrat Abu Sa'id (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) forbade the sale and purchase of unborn animals in the womb until they are born, likewise forbade the sale and purchase of milk in the udders until it is milked and measured, the sale of a runaway slave, and the sale of spoils of war until they have been distributed, and the purchase of things that come as zakat until they have been taken into possession, and also forbade making a deal with a diver that he will dive into the sea and whatever he finds will be given to the buyer.

Hazrat Ibn Abbas (may Allah be pleased with them) says that it is not permissible to sell wool while it is still on the animal’s body, nor milk while it is still in the udders.

Hazrat Ikrimah says: Do not sell a lost mount or a runaway slave until they are found. Because how do you know that they may not be found and your wealth may be lost.

It is narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) forbade the sale of a non-existent thing.