Hindustani is right now the most spoken language in the Indian subcontinent and the fourth most spoken language in the world. The development of Hindustani revolves around the various Hindi dialects originating mainly from Sauraseni Apabhramsha. A Jain text Shravakachar written in 933AD is considered the first Hindi book. Modern Hindi is based on the prestigious Khariboli dialect which started to take Persian and Arabic words too with the establishment of the Delhi Sultanate; however, the Arabic-Persian influence was profound mainly on Urdu and to a lesser extent on Hindi.Khadiboli also started to spread across North India as a vernacular form previously commonly known as Hindustani. Amir Khusrow wrote poems in Khariboli and Brajbhasha and referred that language as Hindavi. During the Bhakti era, many poems were composed in Khariboli, Brajbhasa, and Awadhi. One such classic is Ramcharitmanas, written by Tulsidas in Awadhi. In 1623 Jatmal wrote a book in Khariboli with the name 'Gora Badal ki Katha'.