The Veda is a sacred Hindu book, composed of four collections of hymns and other religious texts. It is believed to be the oldest religious text in the world, and is considered to be the foundation of Hinduism. The Veda is composed of four collections of hymns, known as Rigveda, Yajurveda, Samaveda, and Atharvaveda. Each collection contains different types of hymns, prayers, and rituals, and is believed to have been composed by ancient sages.