The Bakhshali manuscript is an ancient Indian mathematical text that was discovered in 1881 in the village of Bakhshali, Pakistan. It is believed to be the oldest surviving manuscript in Indian mathematics and contains the earliest known use of the zero symbol in India. The manuscript is written in a form of literary Sanskrit influenced by local dialects. It covers various topics in mathematics, including arithmetic, algebra, and geometry. While there has been controversy regarding its dating, recent carbon-dating studies have been met with criticism from specialists. The manuscript is currently housed at the Bodleian Library at the University of Oxford.
https://en.wikipedia.org/wiki/Bakhshali_manuscript