 The story behind this event is that King Prajapati Daksha, father of Sati (the incarnation of Goddess Parvati , wife of Lord Shiva), was performing a yagna ("yagna" is defined as a Hindu fire ritual sacrifice when deities of the Vedic times like Agni, the fire god, and others were invoked by offering oblations such as ghee (clarified butter), milk, grains and so forth) called as Brihaspatirityadi.Sati (also called Shakti) who was Lord Shiva's wife, attended the function without invitation.Daksha who was not fond of his son-in-law, as he considered him a mendicant, purposely did not invite him for the yagna, while he invited all other gods.