Nyang ral

This twelfth-century work has traditionally been ascribed to the treasure-finder, Nyangrel Nyima Ozer (Nyang ral nyi ma ’od zer) (1124–1192). 

 As a history of Buddhist religion (chos ’byung), the text contains a first section on the Buddhist religion, followed by a section on the doctrine in India, and then a section on the doctrine in Tibet. The main focus of the Tibetan section
is the rule of Emperor Songtsen Gampo (Srong brtsan sgam po), extolling him as a Buddhist ruler, who enacts laws based on the ten Buddhist virtues. It includes accounts of the missions of the minister Gar to seek wives for the king from Nepal and
China. It also contains an elaborate account of the journey to Tibet of the two novice monks from Khotan.