The Udānavarga is an early Buddhist collection of topically organized chapters (Sanskrit: varga) of aphoristic verses or "utterances" (Sanskrit: udāna) attributed to the Buddha and his disciples.
While not part of the Pali Canon, the Udānavarga has many chapter titles, verses and an overall format similar to those found in the Pali Canon's Dhammapada and Udāna.
[3] Comparing the Udānavarga, Pali Dhammapada and the Gandhari Dharmapada, Brough (2001) identifies that the texts have in common 330 to 340 verses, 16 chapter headings and an underlying structure.
[5] Hinüber suggests that a text similar to the Pali Canon's Udāna formed the original core of the Sanskrit Udānavarga, to which verses from the Dhammapada were added.
[6] Brough allows for the hypothesis that the Udānavarga, the Pali Dhammapada and the Gandhari Dharmapada all have a "common ancestor" but underlines that there is no evidence that any one of these three texts might have been the "primitive Dharmapada" from which the other two evolved.