Srimad Bhagavatam Canto 07, Chapter 01, Text 44

SB 7.1.44

tatas tau raksasau jatau
 kesinyam visravah-sutau
ravanah kumbhakarnas ca
 sarva-lokopatapanau
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Thereafter the same Jaya and Vijaya, the two doorkeepers of Lord Visnu, took birth as Ravana and Kumbhakarna, begotten by Visrava in the womb of Kesini. They were extremely troublesome to all the people of the universe.
Srimad Bhagavatam Canto 07, Chapter 01, Text 43
Srimad Bhagavatam Canto 07, Chapter 01, Text 45