Which of the following travellers wrote that the untouchables had to sound a clapper in the streets so that people could avoid seeing them?

Fa Xian

The Chinese Buddhist monk Fa Xian (c. fifth century CE) wrote that “untouchables” had to sound a clapper in the streets so that people could avoid seeing them. Another Chinese pilgrim, Xuan Zang (c. seventh century), observed that executioners and scavengers were forced to live outside the city.