That very fearful demon, who was actually the son of Tvasta, covered all the planetary systems by dint of austerity. Therefore he was named Vrtra, or one who covers everything

Expressions researched:
"That very fearful demon, who was actually the son of Tvasta, covered all the planetary systems by dint of austerity. Therefore he was named Vrtra, or one who covers everything"

Srimad-Bhagavatam

SB Canto 6

That very fearful demon, who was actually the son of Tvasta, covered all the planetary systems by dint of austerity. Therefore he was named Vrtra, or one who covers everything.

SB 6.9.18, Translation and Purport

That very fearful demon, who was actually the son of Tvasta, covered all the planetary systems by dint of austerity. Therefore he was named Vrtra, or one who covers everything.

In the Vedas it is said, sa imāḻ lokān āvṛṇot tad vṛtrasya vṛtratvam: because the demon covered all the planetary systems, his name was Vṛtrāsura.