The Charyapada, a collection of mystical poems and songs rediscovered in royal library of Nepal in 1907, is commonly accepted to have been composed and compiled between 8th and 12th centuries CE by 23 Siddhacharyas (tantric masters) of Vajrayana tradition of Buddhism from the tantric traditions of Odisha, Assam, Bengal and Bihar.
This verse (from Charyapada Verse 10), composed by Kānhapāda(Kānhuipā), is a cornerstone of Eastern Indo-Aryan languages. It serves as a "linguistic blueprint", demonstrating the common Abahatta (Apabhramsha) roots that evolved into modern Odia, Assamese, Bangla, Maithili, Magahi and other East Indo-Aryan languages.
Especially for Odia and Bangla speakers, the striking resemblance is unmistakable. The syntax and vocabulary have remained remarkably intact for over a thousand years.