Messenger of Allah ﷺ forbade us (from), two types of business transactions and two ways of dressing. He forbade Mulamasa and Munabadha in transactions. Mulamasa means the touching of another's garment with his hand, whether at night or by day, without turning it over except this much. Munabadha means that a man throws his garment to another and the other throws his garment, and thus confirming their contract without the inspection of mutual agreement.  

نَهَانَا رَسُولُ اللَّهِ ﷺ عَنْ بَيْعَتَيْنِ وَلِبْسَتَيْنِ نَهَى عَنِ الْمُلاَمَسَةِ وَالْمُنَابَذَةِ فِي الْبَيْعِ وَالْمُلاَمَسَةُ لَمْسُ الرَّجُلِ ثَوْبَ الآخَرِ بِيَدِهِ بِاللَّيْلِ أَوْ بِالنَّهَارِ وَلاَ يَقْلِبُهُ إِلاَّ بِذَلِكَ وَالْمُنَابَذَةُ أَنْ يَنْبِذَ الرَّجُلُ إِلَى الرَّجُلِ بِثَوْبِهِ وَيَنْبِذَ الآخَرُ إِلَيْهِ ثَوْبَهُ وَيَكُونُ ذَلِكَ بَيْعَهُمَا مِنْ غَيْرِ نَظَرٍ وَلاَ تَرَاضٍ  

"The Messenger of Allah forbade Munabadhah and Mulamash. Mulamasah is when two men trade garments with each other under cover of night, each man touching the garment of the other with his hand> and Munabadhah is when one man throws a garment to another and the other throws a garment to him, and they trade them with each other in that manner."  

سَمِعْتُ أَبَا هُرَيْرَةَ يَقُولُ نَهَى رَسُولُ اللَّهِ ﷺ عَنِ الْمُلاَمَسَةِ وَالْمُنَابَذَةِ وَالْمُلاَمَسَةُ أَنْ يَتَبَايَعَ الرَّجُلاَنِ بِالثَّوْبَيْنِ تَحْتَ اللَّيْلِ يَلْمِسُ كُلُّ رَجُلٍ مِنْهُمَا ثَوْبَ صَاحِبِهِ بِيَدِهِ وَالْمُنَابَذَةُ أَنْ يَنْبِذَ الرَّجُلُ إِلَى الرَّجُلِ الثَّوْبَ وَيَنْبُذَ الآخَرُ إِلَيْهِ الثَّوْبَ فَيَتَبَايَعَا عَلَى ذَلِكَ