Srimad Bhagavatam Canto 09, Chapter 06, Text 05

SB 9.6.5

tesam purastad abhavann
 aryavarte nrpa nrpa
pañca-vimsatih pascac ca
 trayo madhye ’pare ’nyatah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Of the one hundred sons, twenty-five became kings in the western side of Aryavarta, a place between the Himalaya and Vindhya mountains. Another twenty-five sons became kings in the east of Aryavarta, and the three principal sons became kings in the middle. The other sons became kings in various other places.
Srimad Bhagavatam Canto 09, Chapter 06, Text 04
Srimad Bhagavatam Canto 09, Chapter 06, Text 06