Many dervishes are mendicant ascetics who have taken a vow of poverty, unlike mullahs. The main reason they beg is to learn humility, but dervishes are prohibited to beg for their own good. They have to give the collected money to other poor people. Others work in common professions; Egyptian Qadiriyya – known in Turkey as Kadiri – are fishermen, for example.Some classical writers indicate that the poverty of the dervish is not merely economic.The whirling dance or Sufi whirling that is proverbially associated with dervishes is best known in the West by the practices (performances) of the Mevlevi order in Turkey, and is part of a formal ceremony known as the Sama.