Sage Kambhoja or Kumbhoja is a character in the Sanskrit epic Ramayana

Ramayana

The Ramayana is an ancient Sanskrit epic. It is ascribed to the Hindu sage Valmiki and forms an important part of the Hindu canon , considered to be itihāsa. The Ramayana is one of the two great epics of India and Nepal, the other being the Mahabharata...

, presented as a close friend of sage Agasti.
Sage Agasti was brother of sage Vasishtha and was living as a hermit in Dakshinapatha

Dakshinapatha

Ancient Buddhist and Hindu texts use the term Dakshinapatha as a name for both the southern high road of the Indian subcontinent, and for the region lying south of Majjhimdesa or middle India. It is derived from the two Sanskrit roots dakshina for south, and patha for road.The first reference to...

 http://www.indiangyan.com/books/otherbooks/shri_rama/panchabati.shtml. Rama, Lakshmana

Lakshmana

Lakshmana was the brother and close companion of Rama, and himself a hero in the famous epic Ramayana...

 and Sita

SITA

SITA is a multinational information technology company specialising in providing IT and telecommunication services to the air transport industry...

 had paid visit to the hermitage of sage Kambhoja, from there they had proceeded to Panchavati during their Vanwasa period before Sita was abducted by Sri Lanka

Sri Lanka

Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka is a country off the southern coast of the Indian subcontinent. Known until 1972 as Ceylon , Sri Lanka is an island surrounded by the Indian Ocean, the Gulf of Mannar and the Palk Strait, and lies in the vicinity of India and the...

n king Ravana

Ravana

' is the primary antagonist character of the Hindu legend, the Ramayana; who is the great king of Lanka. In the classic text, he is mainly depicted negatively, kidnapping Rama's wife Sita, to claim vengeance on Rama and his brother Lakshmana for having cut off the nose of his sister...

.