The Practice almost certainly derives with the Tale of Sati, Shiva’s previous spouse. It is now outlawed, but there remain accounts of sati going on, particularly in more remote villages. सागर मध्य कमल हैं जैसे ॥ कार्तिक श्याम और गणराऊ । A seal discovered through excavation of the Indus Valley https://www.youtube.com/shorts/BvYMU70kIQ4