Ashtadhyayi was written by Indian grammarian Panini during the 5th to 6th century BCE.
Ashtadhyayi sets the work standard for the Sanskrit language.
It sums up in 4,000 sutras that had evolved in the Vedic religion.
Panini divided his work into eight chapters , each of which is further divided into quarter chapters. Beyond defining the morphology and syntax of Sanskrit language, Ashtadhyayi distinguishes between usage in the spoken language and usage that is proper to the language of the sacred texts.