Srimad-Bhagavatam: Canto 7 - Chapter 1 - Verse 35

Sanskrit:

देवर्ष्यर्हत्सु वै सत्सु तत्र ब्रह्मात्मजादिषु ।राजन्यदग्रपूजायां मत: पात्रतयाच्युत: ॥ ३५ ॥

ITRANS:

devarṣy-arhatsu vai satsutatra brahmātmajādiṣurājan yad agra-pūjāyāṁmataḥ pātratayācyutaḥ

Translation:

O King Yudhiṣṭhira, the demigods, many great sages and saints including even the four sons of Lord Brahmā, and I myself were present at your Rājasūya sacrificial ceremony, but when there was a question of who should be the first person worshiped, everyone decided upon Lord Kṛṣṇa, the Supreme Person.

Purport:

This is a reference to the Rājasūya sacrifice performed by Mahārāja Yudhiṣṭhira. In that meeting there was a great turmoil over selecting the best person to be worshiped first. Everyone decided to worship Śrī Kṛṣṇa. The only protest came from Śiśupāla, and because of his vehement opposition he was killed by the Supreme Personality of Godhead.