Hinduism and Buddhism have common origins in Ancient India, which later spread and became dominant religions in Southeast Asian countries, including Cambodia and Indonesia around the 4th century CE. Buddhism arose in the Gangetic plains of Eastern India in the 5th century BCE during the Second Urbanisation (600–200 BC). Hinduism developed as a fusion or synthesis of practices and ideas from the ancient Vedic religion and elements and deities from other local Indian traditions.
Both religions share many beliefs and practices but also exhibit pronounced differences that have led to significant debate. Both religions share a belief in karma and rebirth (or reincarnation). They both accept the idea of spiritual liberation (moksha or nirvana) from the cycle of reincarnation and promote similar religious practices, such as dhyana, samadhi, mantra, and devotion. Both religions also share many deities (though their nature is understood differently), including Saraswati, Vishnu (Upulvan), Mahakala, Indra, Ganesha, and Brahma.