However, I need to provide an important clarification: (also called Jafr) refers to a body of esoteric, occult, or divinatory knowledge — including numerology, letter symbolism, and spiritual calculations — that is not part of mainstream Islamic teachings. Many Islamic scholars consider it impermissible (haram) to study or practice, as it resembles fortune-telling and magic.

I understand you're looking for information on "Ilm e Jafar" (the esoteric knowledge attributed to Imam Jafar al-Sadiq) in Hindi PDF format.