Hevajra was an important figure signaling the practice of Buddhist rituals.

King Jayavarman VII placed particular emphasis on Hevajra during consecration rituals and set up a colossal stone sculpture of dancing Hevajra at the gate of his fortified city in Khmer capital at Angkor. In the Cambodia of Jayavarman VII, tantric Buddhism became public and widespread, practiced together with other more mainstream forms of Buddhism, Hinduism, and ancestor worship.

The iconography of Hevajra is described in detail in a text that bears his name, the Hevajra-tantra, first composed in India probably in 800s. Hevajra has 8 heads, sixteen arms, and four legs. His left hands hold images of Indic gods; wealth, death, sun, moon, fire, wind, water, and earth. In his right hands are animals: bull, lion, human, cat, camel, sheep, horse, and elephant. 

Source: The Cleveland museum of art.