Thereafter the same Jaya and Vijaya, the two doorkeepers of Lord Viṣṇu, took birth as Rāvaṇa and Kumbhakarṇa, begotten by Viśravā in the womb of Keśinī. They were extremely troublesome to all the people of the universe.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तत्रापि राघवो भूत्वा न्यहनच्छापमुक्तये । रामवीर्यं श्रोष्यसि त्वं मार्कण्डेयमुखात्प्रभो
tatrāpi rāghavo bhūtvā nyahanacchāpamuktaye | rāmavīryaṃ śroṣyasi tvaṃ mārkaṇḍeyamukhātprabho
SB 7.1.44