Is it possible transfer human soul into deity's avatar or incarnated deity or switch body or soul with them?....to have new body and new appearance

I'm looking for the primary source for the following claim made by Ambedkar (link). I tried finding the text here but I am not able to find it. Does someone know the exact verse of this text in the Veda Vyas Smriti ? This new theory receives support from the Hindu Shastras. The Veda Vyas Smriti ...

Questions about Vedavati and Vaishno Devi? A) Is Vedavati mentioned in the Valmiki/original Ramayan? Not in Uttar Kanda but his original work which ends after the return to Ayodhya. B) Is her story in Vishnu Puran or Bhagavat Puran? Seems like a lot of legends are added on to her so was curious. ...