عَنْ أَبِي سَعِيدٍ رَضِيَ اللَّهُ عَنْهُ قَالَ نَهَى رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ عَنْ لِبْسَتَيْنِ وَعَنْ بَيْعَتَيْنِ فَذَكَرَ الشَّطْرَ الْأَوَّلَ مِنَ الْحَدِيثِ ثُمَّ قَالَ وَأَمَّا الْبَيْعَتَانِ فَالْمُنَابَذَةُ وَالْمُلَامَسَةُ وَالْمُنَابَذَةُ أَنْ يَقُولَ إِذَا نَبَذْتُ هَذَا الثَّوْبَ فَقَدْ وَجَبَ الْبَيْعُ وَالْمُلَامَسَةُ أَنْ يَمَسَّهُ بِيَدِهِ وَلَا يَلْبَسُهُ وَلَا يُقَلِّبُهُ إِذَا مَسَّهُ وَجَبَ الْبَيْعُ
It is narrated from Sayyiduna Abu Sa'id Khudri, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, forbade two types of garments and two types of transactions. (The mention of garments is in another place.) The two transactions are: one is Munabadhah and the other is Mulamasah. Munabadhah is when a person says: When I throw this cloth towards you, the deal will be finalized. And Mulamasah is when a person touches the cloth, without trying it on or turning it over; as soon as he touches it, the deal is finalized.