The Arul Nool (Tamil: அருள் நூல், meaning "Book of Grace" or "Book of Divine Wisdom") is one of the two primary holy scriptures of the Ayyavazhi tradition, a distinct dharma originating in South India. It serves as a complementary text to the Akilathirattu Ammanai (often referred to simply as the Akilam), which is the foundational scripture of Ayyavazhi.
While the Akilam narrates the mythological history and theological framework of Ayyavazhi, the Arul Nool primarily focuses on providing practical guidance, moral codes, prophecies, prayers, and hymns for the followers. It contains explanations of rituals, spiritual practices, and ethical principles to be observed in daily life. Unlike the Akilam, which is attributed to Hari Gopalan, the Arul Nool is believed to be a collection of divine instructions and wisdom compiled by various disciples and followers of Ayya Vaikundar, the central figure of Ayyavazhi.
The Arul Nool is highly revered by Ayyavazhi devotees and is regularly used for recitation, study, and spiritual reflection in Pathis (Ayyavazhi temples) and homes. Its teachings contribute significantly to the understanding and practice of Ayyavazhi dharma, emphasizing principles such as self-restraint, spiritual purity, and devotion to Ayya Vaikundar.