Which book is it in?

[Aqdas]

ya aba bakrin lam ya'rifni haqeeqatan ghayru rabbi

[rafiq]

as-salāmu `alaykum brother

I have found a source to a similar version of this:

al-Imām Muhammad Mahdī al-Fāsī, Matāli`ul-masarrat (Pakistan: Faysalabad: Maktaba Nūriyya Ridwiyya), 129.

You can find the Arabic quote and Urdu translation at the following link:

http://www.research.com.pk/home/fmri/books/ur/shamail/index.minhaj?id=41&e=1152674102

Ma`as-salāma
Rafiq

[Aqdas]

jazakAllah bro.