The roots of Qawwali can be traced back to 8th century Persia (today's Iran and Afghanistan). During the first major migration from Persia, in the 11th century, the musical tradition of Sema migrated to South Asia, Turkey and Uzbekistan. Amir Khusro Dehelvi of the Chisti order of Sufis is credited with fusing the Persian and Indian musical traditions to create Qawwali as we know it today in the late 13th century in India. [1]The word Sama is often still used in Central Asia and Turkey to refer to forms very similar to Qawwali, and in India, Pakistan and Bangladesh, the formal name used for a session of Qawwali is Mehfil-e-Sama.
Qaul (Arabic: قَوْل) is an "utterance (of the prophet)", Qawwāl is someone who often repeats (sings) a Qaul, Qawwāli is what a Qawwāl sings.