"Oh Sweetness of the World," -- the song and Maqam Zanjaran seem perfectly matched. Though one could say the same thing about many of Zakaria Ahmed's compositions. This is, as far as I know, the original performance by Zakiya Hamdan, although many many Tarab singers have done this song--for good reason!
See the following analyses:
Jins Ajam,
Jins Hijaz,
Jins Ajam Baggage,
Jins Hijazkar,
Jins Nakriz