Srimad-Bhagavatam: Canto 7 - Chapter 1 - Verse 13

Sanskrit:

अत्रैवोदाहृत: पूर्वमितिहास: सुरर्षिणा ।प्रीत्या महाक्रतौ राजन् पृच्छतेऽजातशत्रवे ॥ १३ ॥

ITRANS:

atraivodāhṛtaḥ pūrvamitihāsaḥ surarṣiṇāprītyā mahā-kratau rājanpṛcchate ’jāta-śatrave

Translation:

Formerly, O King, when Mahārāja Yudhiṣṭhira was performing the Rājasūya sacrifice, the great sage Nārada, responding to his inquiry, recited historical facts showing how the Supreme Personality of Godhead is always impartial, even when killing demons. In this regard he gave a vivid example.

Purport:

This relates to how the Lord exhibited His impartiality even when killing Śiśupāla in the arena of the Rājasūya yajña performed by Mahārāja Yudhiṣṭhira.