Śrīmad-Bhāgavatam · Text 10.66.38
Who is speaking and story frame
सर्वस्यान्तर्बहि:साक्षी कृत्यां माहेश्वरीं विभु: ।
विज्ञाय तद्विघातार्थं पार्श्वस्थं चक्रमादिशत् ॥ ३८ ॥
sarvasyāntar-bahiḥ-sākṣī
kṛtyāṁ māheśvarīṁ vibhuḥ
vijñāya tad-vighātārthaṁ
pārśva-sthaṁ cakram ādiśat
The almighty Lord, the internal and external witness of all, understood that the monster had been produced by Lord Śiva from the sacrificial fire. To defeat the demon, Kṛṣṇa dispatched His disc weapon, who was waiting at His side.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.