Ahmad Rashad studied the Arabic language and the Quran with his mentor, the late Rashad Khalifa.[26][156] Muhammad Tawfiq Sidqi (1881–1920),[157] Egyptian scholar and physician who focused on criticising hadith as a whole religiously from the Quran as well as based on hadithic pseudo-scientific claims on medicine.[158][159] Mohamed Talbi (1921–2017), Tunisian historian and professor.