Al-Arba'in fi Ahwal-al-Mahdiyin

It appends an apocalyptic ode of Sufi saint Shah Nimatullah Wali (1330-1431) at the end of the book.

According to Professor C. M. Naim of Chicago University, this copy, which he calls Q1, "had long existed, and was undoubtedly copied and shared by thousands of people, its debut in the political discourse of South Asian Muslims occurred near the middle of the 19th century.

On the first page of the book, the author has mentioned the Hadith: This is the basis of the belief of Mujaddids in the past centuries, some times lists are given to that effect.

The author Shah Ismail Shaheed (of Al-Arba'in fi Ahwal-al-Mahdiyin), by drawing a line over the words كيف انتم اذا نزل ابن مريم فيكم ; and using the Gematria or the Abjad numerals has calculated the Value of the phrase, (by adding the Arabic phrase letter-by-letter and getting its cumulative value according to the Abjad numerals), printing over the line the words: Year 1883 CE and as of Hijri Year 1300 (Hijri).

The idea of appending these verses of the Great Sufi poet and Mystic of the 14th Century, Nimatullah, appears to be that he thought these verses closely described the same theme which the collection of those 40 Ahadith tend to do, i.e. the appearance of the Mahdi and Messiah.