cannot be understood in its legal sense, because wine is not legally saleable. When it is impossible to construe it according to its true legal meaning, we construe it according to its outward form. Thus, as soon as he sells wine, he breaks his oath. Accordingly, in the example mentioned earlier of selling tobacco, if he says, “By Allah, I shall not sell tobacco,” and then sells it, he breaks his oath—not because it is a sale, but because it has the form of what he swore not to do. Likewise, if he says, “By Allah, I shall not sell through usury,” and then goes and sells through usury, he breaks his oath, because he qualified the oath with something that prevents validity; it is therefore construed according to the outward form.
However, if he says, “By Allah, I shall not sell,” and then sells one dinar for two dinars, he has not broken his oath, because he stated it without qualification, and an unqualified term refers to what is legally valid.
Some scholars said that he does not break his oath if he sells something whose sale is prohibited, even if he qualifies it with something that prevents validity, because of the contradiction involved. The statement, “I shall not sell wine,” contains a contradiction between the word “sell” and “wine.” Accordingly, we say: even if he sells wine, it is not a sale. Whoever considers the outward form holds that he has broken his oath, whereas whoever considers the true reality holds that he has not. The scholars have two views on this issue; according to the established position of the school, he breaks his oath by the mere form of the contract.
If he says, “By Allah, I shall not sell the offspring of my she-camel that is in her womb,” and then sells it, then according to the established position of the school he breaks his oath, because he breaks it by the mere form of the contract: he qualified his oath with something that prevents validity—that is, he connected it to something with which the contract cannot be valid—so it is construed according to the outward form.
Another example is leasing a shop to someone in order to carry out something unlawful in it—for instance, leasing it to him so that he may engage in usury there. This is prohibited, and the contract is invalid. Thus, if he says, “By Allah, I shall not lease my shop to someone who deals in usury,” and then leases it to him, then according to