Śrīmad Bhāgavatam 1.7.30

saḿhatyānyonyam ubhayos

tejasī śara-saḿvṛte

āvṛtya rodasī khaḿ ca

vavṛdhāte 'rka-vahnivat

SYNONYMS

saḿhatya — by combination of; anyonyam — one another; ubhayoḥ — of both; tejasī — the glares; śara — weapons; saḿvṛte — covering; āvṛtya — covering; rodasī — the complete firmament; kham ca — outer space also; vavṛdhāte — increasing; arka — the sun globe; vahni-vat — like fire.

TRANSLATION

When the rays of the two brahmāstras combined, a great circle of fire, like the disc of the sun, covered all outer space and the whole firmament of planets.

PURPORT

The heat created by the flash of a brahmāstra resembles the fire exhibited in the sun globe at the time of cosmic annihilation. The radiation of atomic energy is very insignificant in comparison to the heat produced by a brahmāstra. The atomic bomb explosion can at utmost blow up one globe, but the heat produced by the brahmāstra can destroy the whole cosmic situation. The comparison is therefore made to the heat at the time of annihilation.