[Machine] About the scholars from the people of Madinah, they used to say that Tarrar (a specific type of monetary transaction) is a form of Qat', and they used to say that there should be no Qat' except for something that has reached the value of a quarter of a Dinar or more.  

عَنِ الْفُقَهَاءِ مِنْ أَهْلِ الْمَدِينَةِ أَنَّهُمْ كَانُوا يَقُولُونَ عَلَى الطَّرَّارِ الْقَطْعُ وَكَانُوا يَقُولُونَ لَا قَطْعَ إِلَّا فِيمَا بَلَغَتْ قِيمَتُهُ رُبْعَ دِينَارٍ فَصَاعِدًا