[‘The curse of Allah be upon the liars’] concerning him. And I wished chastisement from God Almighty for him as, while writing the book Fath-e-Islam, I had published it and I had written the following [Quranic prayer challenge]:Maulawi Isma‘il, a resident of Aligarh, was the first to gird his loins in hostility and, as I have mentioned in my book Fath-e-Islam, he publicised concerning me that I prophesy with the help of geomancy and astrology and that I keep astrological instruments in my possession. I replied [‘The curse of Allah be upon the liars’] concerning him. And I wished chastisement from God Almighty for him as, while writing the book Fath-e-Islam, I had published it and I had written the following [Quranic prayer challenge]:
[Come, let us call our sons and your sons, and our women and your women, and our people and your people; then let us pray fervently and invoke the curse of Allah upon the liars.]
Accordingly, about a year had elapsed since this mubahalah [prayer duel] that he suddenly suffered some unexpected illness and died. In his book that he had published against me in rebuttal, he had written 
come and falsehood has vanished’]. Thus did God make it manifest to all as to who is in the right that stood firm and who was false that ran away. Some sixteen years have elapsed since he died after this mubahalah.1
1 Maulawi Isma‘il, in one of his pamphlets, had prayed against me invoking my death, then soon after this curse he died and his curse recoiled upon himself. (Author)