Khali Mod Da ni Data Hijvairi is a most beautiful qwalli of Nusrat Fateh Ali KHan. It is full love with Data Saab. A qawwal is a specially-trained male vocalist who performs qawwali, a musical expression of devotional poetry practiced by the Sufis. The Sufis, an ancient mystical sect of Islam, achieve spiritual enlightenment through music, much like a Whirling Dervish achieves a higher state of consciousness through dancing.