Formerly, O King, when Maharaja Yudhisthira was performing the Rajasuya sacrifice, the great sage Narada, responding to his inquiry, recited historical facts showing how the Supreme Personality of Godhead is always impartial, even when killing demons

Expressions researched:
"Formerly, O King, when Maharaja Yudhisthira was performing the Rajasuya sacrifice, the great sage Narada, responding to his inquiry, recited historical facts showing how the Supreme Personality of Godhead is always impartial, even when killing demons"

Srimad-Bhagavatam

SB Canto 7

Formerly, O King, when Maharaja Yudhisthira was performing the Rajasuya sacrifice, the great sage Narada, responding to his inquiry, recited historical facts showing how the Supreme Personality of Godhead is always impartial, even when killing demons.

SB 7.1.13, Translation and Purport

Formerly, O King, when Maharaja Yudhisthira was performing the Rajasuya sacrifice, the great sage Narada, responding to his inquiry, recited historical facts showing how the Supreme Personality of Godhead is always impartial, even when killing demons.

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