forbade a sale and a condition [5]. Furthermore, a valid condition does not affect the sale even if they are numerous, while a corrupt one affects it even if it is singular. The hadith we narrated points to the distinction. Also, if slight uncertainty (gharar) is tolerated in a contract, it does not necessarily follow that a large amount is tolerated. Their hadith is not authentic, it has no basis, Ahmad denied it, and we do not know it to be narrated in any Musnad, so it is not to be relied upon. The Qadi's statement that the prohibition remains in its generality for every two conditions is also far-fetched; for a condition that the contract necessitates does not affect it without disagreement. As for a condition that is of the interest of the contract—such as a deferment, an option, collateral, a guarantor, or the stipulation of an attribute in the sold item like writing or craftsmanship—it involves the interest of the contract, so it should not affect its invalidity either, whether few or many. Ahmad did not mention anything of this category in this issue, so the outward meaning is that it is not intended by him.

Section: Conditions are divided into four categories. The first is that which is of the necessity of the contract, such as stipulating delivery, the option of the session (khiyar al-majlis), and immediate exchange of payment and item. The existence of this is like its non-existence; it provides no ruling and does not affect the contract.

The second is that which involves the interest of the contracting parties, such as a deferment, an option, collateral, a guarantor, witness, or the stipulation of an intended attribute in the sold item, such as craftsmanship, writing, and the like. This is a permissible condition that must be fulfilled, and we know of no disagreement regarding the validity of these two categories.

The third is that which is not of its necessity, nor of its interest, and does not contradict its necessity. It is of two types: the first is stipulating a benefit for the seller in the sold item, and this has already been mentioned. The second is stipulating one contract within another, such as selling something on the condition that he sells him something else, or buys