and the fat, it is not valid, because it leads to uncertainty (jahala) regarding the price at the time. It is the same whether they are both ignorant of the weight of both, or the weight of one of them, for the same reason.
Section: If he finds dregs (rubb) in the container of ghee, Ibn al-Mundhir said: Ahmad and Ishaq said: If he is a merchant of ghee and has ghee with him, he gives him ghee equivalent to its weight; and if he does not have ghee with him, he gives him the value of the dregs from the price. Shurayh obligated him to give [the value of] the dregs in ghee in all cases. Al-Thawri said: If he wishes, he takes what he found, and he is not obligated to give him ghee equivalent to the dregs. Our view is that he found the measured sold item to be deficient, so it is like if he bought a heap and found a mound underneath it, or bought it on the basis that it was ten qafiz and it turned out to be nine. We have already explained that he takes what is present for its proportionate share of the price; it is the same here. According to this, he only takes what is present of the ghee for its proportionate share of the price, and the seller is not obligated to give him [additional] ghee, whether he has it available or not. If they both consent to him giving him ghee, it is permissible. And Allah knows best.
(26) Al-rubb: the dregs of ghee, its sediment; it is what settles underneath it from its impurities.
والدُّهْنِ، لم يَصِحَّ؛ لأنَّه يُؤَدِّى إلى جَهالةِ الثَّمَنِ في الحالِ. وسواءٌ جَهِلَا زِنَتَهُما جَمِيعًا، أو زِنَةَ أحَدِهما؛ لذلك.
فصل: وإن وَجَدَ في ظَرْفِ السَّمْنِ رُبًّا (٢٦)، فقال ابنُ المُنْذِرِ: قال أحْمَدُ وإسْحاقُ: إن كان سَمَّانًا، وعندَه سَمْنٌ، أعْطاهُ بِوَزْنِه سَمْنًا، وإن لم يكُنْ عندَه سَمْنٌ، أعْطاهُ بِقَدْرِ الرُّبِّ من الثَّمَنِ. وأَلْزَمَهُ شُرَيْحٌ بِقَدْرِ الرُّبِّ سَمْنًا بكلِّ حالٍ. وقال الثَّوْرِيُّ: إن شاءَ أخَذَ الذى وَجَدَهُ، ولا يُكَلَّفُ أن يُعْطِيَه بِقَدْرِ الرُّبِّ سَمْنًا. ولَنا، أنَّه وَجَدَ المَبيعَ المَكِيلَ ناقِصًا، فأشْبَهَ ما لو اشْتَرَى صُبْرَةً، فوَجَدَ تَحتها رَبْوَةً، أو اشْتَراها على أنَّها عَشَرَةٌ أقْفِزَةٍ، فبانَتْ تِسْعَةً، وقد بَيَّنَّا أنَّه يَأْخُذُ المَوْجُودَ بِقِسْطِه من الثَّمَنِ، كذا هاهُنا. فعلى هذا إنَّما يَأْخُذُ المَوْجُودَ من السَّمْنِ بِقِسْطِه من الثَّمَنِ، ولا يَلْزَمُ البائِعَ أنَّ يُعْطِيَه سَمْنًا، سواءٌ كان مَوْجُودًا عندَه، أو لم يكُنْ، فإن تَرَاضَيا على إعْطائِه سَمْنًا، جازَ، واللهُ أعلمُ.
(٢٦) الرب: رب السمن، سفله، وهو ما استقر تحته من كدره.