[1] In the last years of his life, he taught mugham at the Shusha Music School and served as chairman of the Republican Trade Union Council of Art Workers.
The main reason for this popularity was that, Sadigjan had added a "Zabul" veil to the tar.
Zabul Gasim performed for the first time in front of the Baku audience at the "Oriental Concert" held on January 27, 1903, in the theater building of H.Z.Taghiyev with Jabbar Garyaghdioglu, Shakili Alasgar and Seyid Mirbabayev.
Zulfugar Hajibeyov, an Azerbaijani composer, invited him to the stage for the first time and highly appreciated his art.
Zabul Qasim sang "Zabul-segah", "Bayaty-Shiraz", "Humayun", "Shur", "Mahur-Hindi" and several other classifications.