Earlier quoted context omitted.
In India, there are monks who live without any food (and water as well) for more than a month or so. Initially, I did not believe but then I confirmed from many people and it was true. They basically do meditation during that period and gain their energy from nature.
Some proof for down voters: 1) https://timesofindia.indiatimes.com/city/mumbai/Jain-monk-co... 2) https://en.wikipedia.org/wiki/Prahlad_Jani
http://www.lightdocumentary.com/ Trailer: https://youtu.be/Ul82-jaDmlY