Early proponents ascribe the authority of Ahl al-Hadith to specific hadith of Mohammed. Ibn Hajar mentioned the people of hadith in his commentary of the hadith, "And this nation will continue, established upon Allah’s command, unharmed by those who oppose them until the arrival of Allah’s order." He stated that Muhammad ibn Ismael al-Bukhari was adamant that those referred to in this hadith were the people with knowledge of the narrations, Ahl al-Athar, i.e. the people of hadith. And then quoted Ahmad ibn Hanbal as saying, "If they are not Ahl al-Hadith, then I do not know who they are." Al-Qadi ‘Iyyad explained that Ahmad was referring to Ahl al-Sunnah and those who share the beliefs of the people of hadith.