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.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
संहत्यान्योन्यमुभयोस्तेजसी शरसंवृते । आवृत्य रोदसी खं च ववृधातेऽर्कवह्निवत्
saṃhatyānyonyamubhayostejasī śarasaṃvṛte | āvṛtya rodasī khaṃ ca vavṛdhāte'rkavahnivat
SB 1.7.30