The Prakrits (which includes Pali) were gradually transformed into Apabhraṃśas (अपभ्रंश) which were used until about the 13th century CE. The term apabhraṃśa, meaning "fallen away", refers to the dialects of Northern India before the rise of modern Northern Indian languages, and implies a corrupt or non-standard language. A significant amount of apabhraṃśa literature has been found in Jain libraries. While Amir Khusro and Kabir were writing in a language quite similar to modern Hindi-Urdu, many poets, especially in regions that were still ruled by Hindu kings, continued to write in Apabhraṃśa. Apabhraṃśa authors include Sarahapad of Kamarupa, Devasena of Dhar (9th century CE), Pushpadanta of Manikhet (9th century CE), Dhanapal, Muni Ramsimha, Hemachandra of Patan, Raighu of Gwalior (15th century CE). An early example of the use of Apabhraṃśa is in Vikramūrvashīiya of Kalidasa, when Pururava asks the animals in the forest about his beloved who had disappeared.