That Sita sat under an Ashoka tree (a- shoka : without sorrow) in the Ashoka grove during her stay in Lanka is commonly known episode of the Ramayana. Not so well known however, is an interesting myth from the Bhavishya Purana that adds a precursor to that tale. As it is seen with other Purana stories, it is plausible that this tale too was an attempt at acculturation and social synthesis.
Years before the abduction of Sita by Ravana, there lived a cannibal among the Bhil tribe named Sashoka. He roamed the forests of central India and lived by killing passers-by and consuming them as food.