Yahya related to me from Malik that he had heard that the Messenger of Allah ﷺ forbade two sales in one sale.  

أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى عَنْ بَيْعَتَيْنِ فِي بَيْعَةٍ  

Yahya related to me from Malik from Muhammad ibn Yahya ibn Habban and from Abu'z-Zinad from al-Araj from Abu Hurayra that the Messenger of Allah ﷺ forbade mulamasa and munabadha. Malik said, "Mulamasa is when a man can feel a garment but is not allowed to unfold it or examine what is in it, or he buys by night and does not know what is in it. Munabadha is that a man throws his garment to another, and the other throws his garment without either of them making any inspection. Each of them says, 'this is for this. 'This is what is forbidden of mulamasa and munabadha." Malik said that selling bundles with a list of their contents was different from the sale of the cloak concealed in a bag or the cloth folded up and such things. What made it different was that it was a common practice and it was what people were familiar with, and what people had done in the past, and it was still among the permitted transactions and trading of people in which they saw no harm because in the sale of bundles with a list of contents without undoing them, an uncertain transaction was not intended and it did not resemble mulamasa.  

أنَّ رَسُولَ اللَّهِ ﷺ: «نَهى عَنِ المُلامَسَةِ والمُنابَذَةِ» -[٦٦٧]- قالَ مالِكٌ: «والمُلامَسَةُ: أنْ يَلْمِسَ الرَّجُلُ الثَّوْبَ، ولا يَنْشُرُهُ، ولا يَتَبَيَّنُ ما فِيهِ، أوْ يَبْتاعَهُ لَيْلًا، ولا يَعْلَمُ ما فِيهِ، والمُنابَذَةُ أنْ يَنْبِذَ الرَّجُلُ إلى الرَّجُلِ ثَوْبَهُ، ويَنْبِذَ الآخَرُ إلَيْهِ ثَوْبَهُ عَلى غَيْرِ تَأمُّلٍ مِنهُما، ويَقُولُ كُلُّ واحِدٍ مِنهُما هَذا بِهَذا، فَهَذا الَّذِي نُهِيَ عَنْهُ مِنَ المُلامَسَةِ والمُنابَذَةِ» قالَ مالِكٌ: «فِي السّاجِ المُدْرَجِ فِي جِرابِهِ، أوِ الثَّوْبِ القُبْطِيِّ المُدْرَجِ فِي طَيِّهِ، إنَّهُ لا يَجُوزُ بَيْعُهُما، حَتّى يُنْشَرا، ويُنْظَرَ إلى ما فِي أجْوافِهِما، وذَلِكَ أنَّ بَيْعَهُما مِن بَيْعِ الغَرَرِ، وهُوَ مِنَ المُلامَسَةِ» قالَ مالِكٌ: «وبَيْعُ الأعْدالِ عَلى البَرْنامَجِ، مُخالِفٌ لِبَيْعِ السّاجِ فِي جِرابِهِ، والثَّوْبِ فِي طَيِّهِ، وما أشْبَهَ ذَلِكَ، فَرَقَ بَيْنَ ذَلِكَ الأمْرُ المَعْمُولُ بِهِ، ومَعْرِفَةُ ذَلِكَ فِي صُدُورِ النّاسِ، وما مَضى مِن عَمَلِ الماضِينَ فِيهِ، وأنَّهُ لَمْ يَزَلْ مِن بُيُوعِ النّاسِ الجائِزَةِ، والتِّجارَةِ بَيْنَهُمِ الَّتِي لا يَرَوْنَ بِها بَأْسًا، لِأنَّ بَيْعَ الأعْدالِ عَلى البَرْنامَجِ عَلى غَيْرِ نَشْرٍ، لا يُرادُ بِهِ الغَرَرُ، ولَيْسَ يُشْبِهُ المُلامَسَةَ»