Basawakkulama or Abhayavāpī rock inscription probably from the time of king Upatissa, documenting the gift of two villages and some agricultural land to a Buddhist establishment in the late fourth century C.E. The inscription is at Anuradhapura.

Senarath Paranavitana, "New Light on the Buddhist Era in Ceylon and Early Sinhalese Chronology," University of Ceylon Review 18, nos. 3-4 (1960): 129-156.