Rajapura or Rajapuram was the capital of Kamboja Kingdom of the epic times as evidenced by epic Mahabharata. Karna had led a war expedition against the Kamboj and some other tribes of the Uttarapatha a little time before the Kurukshetra war i.e. Karana Rajapuram gatva Kamboja Nirjitastvaya. Chinese pilgrim Hiuen Tsang [602/603? - 664 CE], who had traveled to India (~629-645 CE), names this city as Ho-b-she-pu-lo which has been identified as Rajapura of Sanskrit tradition by Watters and others.
- See: Political History of Ancient India, 1996, p 132 seq, Dr H. C. Raychaudhury, Dr B. N. Mukerjee.
- A History of India, p 269-71, N. R. Ray, N. K. Sinha.
- Journal of Indian History, P 304, University of Allahabad. Department of Modern Indian History, University of Kerala - 1921; Military History of India, 1980, p 38, Hemendra Chandra Kar - History.
- Bimbisāra to Aśoka: with an appendix on the later Saud, 1977, p 16, Sudhakar Chattopadhyaya - India - 1977.
- Purana Index , 1992, p 79, A. B. L. Awasthi.
- Mahabharata 7/4/6) and 7/91/39-40
- On Yuan Chwang's travels in India, 629-645 A.D, Vol I, p 284, Thomas Watters, Thomas William Rhys Davids, Stephen Wootton Bushell.
- See: Political History of Ancient India, 1996, p 133 ff, Dr H. C. Raychaudhury, Dr B. N. Mukerjee.
- Buddhist centres in ancient India, 1969, p 162, Binayendra Nath Chaudhury.