Srimad Bhagavatam Canto 04, Chapter 22, Text 02

SB 4.22.2

tams tu siddhesvaran raja
vyomno ’vatarato ’rcisa
lokan apapan kurvanan
sanugo ’casta laksitan
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
 
Seeing the glowing effulgence of the four Kumaras, the masters of all mystic power, the King and his associates could recognize them as they descended from the sky.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
 
The four Kumaras are described herein as siddhesvaran, which means “masters of all mystic power.” One who has attained perfection in yoga practice immediately becomes master of the eight mystic perfections — to become smaller than the smallest, to become lighter than the lightest, to become bigger than the biggest, to achieve anything one desires, to control everything, etc. These four Kumaras, as siddhesvaras, had achieved all the yogic perfectional achievements, and as such they could travel in outer space without machines. While they were coming to Maharaja Prthu from other planets, they did not come by airplane, but personally. In other words, these four Kumaras were also spacemen who could travel in space without machines. The residents of the planet known as Siddhaloka can travel in outer space from one planet to another without vehicles. However, the special power of the Kumaras mentioned herewith is that whatever place they went to would immediately become sinless. During the reign of Maharaja Prthu, everything on the surface of this globe was sinless, and therefore the Kumaras decided to see the King. Ordinarily they do not go to any planet which is sinful.
Srimad Bhagavatam Canto 04, Chapter 22, Text 01
Srimad Bhagavatam Canto 04, Chapter 22, Text 03