There are numerous stories regarding the origin of onion in Hinduism and some of the give the reason why onion is considered as non-vegetarian by certain Hindu communities. This particular story is associated with Vedic Yajnas. During the Satya Yuga, Sages performed Gomedha Yajna (cow sacrifice) and Ashvamedha Yajna (horse sacrifice) for the welfare of the people. During the course of the yajna, a cow or horse was sacrificed. At the culmination of the Yajna, the same cow or horse was brought back to life by the Rishis through mantras but with a younger body. Once, a sage was performing Gomedha Yajna. The wife of the sage was pregnant and she desired to eat meat. She believed that if a pregnant woman had a desire to eat and did not eat then the child born will always have saliva coming out of the mouth. So when the cow was sacrificed, she took a small piece of meat and hid it. Soon the sacrifice ended and the Rishi chanted mantras and brought back the cow to life but h