Qawwali is the South Asian Muslim equivalent of African-American Gospel music. This particular song celebrates the thirteenth-century Sindhi mystic, Sayyid `Uthman Marwandi, known as Lal Shahbaz Qalandar (1177 – 1274 AD), a Sufi master of the Suhrawardi order. His epithet means “Red Royal Falcon, the wandering mystic.” He was one of four great masters at Multan whose work formed the matrix of spirituality in what is now Pakistan.
The most famous rendering of the qawwali in his honor is that of Nusrat Fateh Ali Khan (d. 1997).
Lyrics.com has this:
Upon My breath and in my intoxication is the great Qalander.
My worship and upon my breath is the name of Ali.
I am intoxicated with the beloved Qalander
I am intoxicated with Jhoole Laal who is intoxicated with Qalander
Keep repeating his name you follower of Ali
You Ali !!! Keep saying his name.”
The shrine of Lal Shahbaz Qalandar in Pakistan: