In the earliest phase of Islam, the Quran was primarily preserved through memorization by the companions of Prophet Muhammad ﷺ. Alongside this strong oral tradition, the revelations were also written down during his lifetime by appointed scribes on various available materials such as palm leaves, flat stones, bones, and especially leather (adīm)—a durable and revered medium. Historical accounts note that letters and treaties dictated by the Prophet ﷺ were inscribed by scribes onto tanned hides and dispatched to neighboring rulers, highlighting the significance of leather in early Islamic documentation.