I came across this blog by Samvartha ‘Sahil’, where he mentions a poem by Nida Fazil. 
  Here is the poem he mentions: 

” Karachi ek maa hai

Bambai bichada hua beta

yeh rishta pyar ka pakeezha rishta hai jise ab tak

na koi tod paaya hai

na koi tod paayega

na meri maa kabhi talwaar taane ran me aayi hai

na maine apni maa ke saamne bandook uthaayi hai

yeh kaisa shor-o-hangaama hai yeh kiski ladaayi hai

Karaachi ek maa hai. ”
                        Nida Fazli, 

Read the rest of his blog here.