All the demigods from the upper, lower and middle universal planetary systems assembled at the altar of the rājasūya sacrifice performed by Mahārāja Yudhiṣṭhira. After seeing the beautiful bodily features of Lord Kṛṣṇa, they all contemplated that He was the ultimate dexterous creation of Brahmā, the creator of human beings.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यद्धर्मसूनोर्बत राजसूये निरीक्ष्य दृक्स्वस्त्ययनं त्रिलोकः । कार्त्स्न्येन चाद्येह गतं विधातु- रर्वाक्सृतौ कौशलमित्यमन्यत
yaddharmasūnorbata rājasūye nirīkṣya dṛksvastyayanaṃ trilokaḥ | kārtsnyena cādyeha gataṃ vidhātu- rarvāksṛtau kauśalamityamanyata
SB 3.2.13