Mithi ( Sanskrit: मिथि ) was the king of Videha Kingdom in the ancient Indian Subcontinent.
[3][4] According to Bal Kand of Valmiki Ramayana, King Mithi had a son named as Udavasu who became successor of the kingdom after him.
[6][7] King Mithi is considered to be the first promoter of the Karmakanda ritual in Pitripaksha festival.
Then Guru Vashishtha called this practice of donation as "Divine inspiration" and from here it is believed as the origination of Shraddha Karma for ancestors.
[8] According to the sixth chapter of Devi Bhagavata, once the King Nimi was cursed to death by the sage Vashishtha for performing Yajna in his absence.