However, this theory does not address the evidence of occasional incidences of "sati" in pre-Islamic times. The 510 CE inscription at Eran mentioning the wife of Goparaja, a vassal of Bhanugupta, burning herself on her husband's pyre is considered to be a Sati stone. Vidya Dehejia states that sati became regular only after 500 CE. He states that the practice originated among the Kshatriyas and remained mostly limited to the warrior class among Hindus. Yang adds that the practice was also emulated by those seeking to achieve high status of the royalty and the warriors.