Answer
(Fatwa: 1036/860/B=1433)
Ahl Hadith are quite ignorant and unaware of hadith. Your cousin is also ignorant and unaware of hadith. The author of Mishkah has mentioned fifteen hadith on the page number 24, 25 and 26, in the evidence of Azab-e-Qabr (grave torment), out of which 5 hadith are from Bukhari and Muslim and remaining 10 hadith are from the six authentic books of Hadith. He also has categorized a separate chapter in Mishkah [باب إثبات عذاب القبر] under which he has mentioned the following hadith:
عن البراء بن عازب عن النبى صلى الله عليه وسلم قال : المسلم إذا سئل فى القبر يشهد أن لا اله إلا الله وأن محمداً رسول الله فذلك قوله يثبت الله الذين آمنوا بالقول الثابت فى الحیوة الدنيا وفى الآخرة – وفى رواية عن النبى صلى الله عليه وسلم قال : يثبت الله الذين آمنوا بالقول الثابت نزلت فى عذاب القبر يقال له من ربك فيقول ربى الله و نبيي محمد . (متفق عليه)
This hadith of Bukhari and Muslim tells that the punishment in grave is proved from the holy Quran and Hadith as well. It is foolish to say that there is not even a single hadith on Azab-e-Qabr.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband