atraivodāhṛtaḥ pūrvam
itihāsaḥ surarṣiṇā
prītyā mahā-kratau rājan
pṛcchate 'jāta-śatrave
atra - in this connection; eva - certainly; udāhṛtaḥ - was recited; pūrvam - previously; itihāsaḥ - an old story; sura-ṛṣiṇā - by the great sage Nārada; prītyā - with joy; mahā-kratau - at the great Rājasūya sacrifice; rājan - O King; pṛcchate - to the inquiring; ajāta-śatrave - Mahārāja Yudhiṣṭhira, who had no enemy.
This relates to how the Lord exhibited His impartiality even when killing Śiśupāla in the arena of the Rājasūya yajña performed by Mahārāja Yudhiṣṭhira.