Ahmad ibn Hanbal was an Islamic scholar, theologian and one of the strictest followers of hadith traditionalism. He founded the Hanbali school of Islam law. His extensive knowledge of Quran and hadith, earned him the reputation of a prominent hadith scholar of all times. Hanbali, being one of the four primary orthodox schools of Sunni jurisprudence, preached a more traditionalist and literalism-oriented interpretation of the Quran and hadith. Ahmad ibn Hanbal picked up an argument with Caliph Abul-Abbas Al-Mamun who challenged his rights to rephrase such religious texts. He travelled to various countries and studied fiqh and hadith under many teachers and scholars. Al-Musnad, one of the most significant Sunni hadith collections, was assembled by him. His imprisonment along with other scholars in Baghdad during the ‘Mihna’ period was a momentous event in Islamic history.