Srimad Bhagavatam Canto 04, Chapter 16, Text 14

SB 4.16.14

asyapratihatam cakram
prthor amanasacalat
vartate bhagavan arko
yavat tapati go-ganaih
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Just as the sun-god expands his shining rays up to the Arctic region without impedance, the influence of King Prthu will cover all tracts of land up to the Arctic region and will remain undisturbed as long as he lives.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Although the Arctic region is not visible to ordinary persons, the sun shines there without impediment. Just as no one can check the sunshine from spreading all over the universe, no one could check the influence and reign of King Prthu, which would remain undisturbed as long as he lived. The conclusion is that the sunshine and the sun-god cannot be separated, nor could King Prthu and his ruling strength be separated. His rule over everyone would continue without disturbance. Thus the King could not be separated from his ruling power.
Srimad Bhagavatam Canto 04, Chapter 16, Text 13
Srimad Bhagavatam Canto 04, Chapter 16, Text 15