It seems you are searching for a from "Maktabah Jafariyah" (جعفریہ لائبریری / المكتبة الجعفرية).
"Maktabah Jafariyah" is a well-known digital library that contains thousands of Shia Islamic books in Urdu, Arabic, Persian, and English. Many people look for PDFs from this collection for offline reading.
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