in the session, the buyer says: “I accept at one hundred and twenty.” Then another man comes wishing to buy it from the buyer at cost price. Should he say: “My cost price is one hundred and twenty?”

The answer is: No. He must disclose it and say: “I bought it for one hundred, then, during the period of option, the price was increased for me.” This is because the first contract was concluded for one hundred, so he must be truthful. Even in this case, he must add the increase to the cost price and disclose it.

His statement, “or something is deducted from it during the period of option,” means likewise that, if this occurs during the period of option, he must disclose it.

For example, once the sale has been concluded between the seller and buyer while they are still in the session, the buyer says: “I have been overcharged. I bought it from you for one hundred, whereas it is worth only eighty.” They then agree on eighty, and he sells it for eighty. If someone buys it from him at cost price, he must say: “I bought it for one hundred, then I reduced it to eighty,” in consideration of the first contract, so that the first contract is not nullified.

But if the reduction takes place after they have parted—for example, if I bought this house for ten thousand riyals, we parted, and I brought the money to the seller, who then said: “I now waive one thousand riyals for you”—then disclosure is not required, because he said, “during the period of option,” whereas here the reduction occurred after the sale had become binding.

His statement, “or compensation is taken for a defect”: an example is a man who buys a sheep for one hundred riyals, then discovers in it a defect assessed at twenty, which the seller pays to the buyer. If the one who bought the sheep sells it at his cost price, should he say: “I bought it for eighty,” or should he say: “For one hundred, then twenty was deducted because of the defect?”