SB 10.18.18
tam vidvan api dasarho
bhagavan sarva-darsanah
anvamodata tat-sakhyam
vadham tasya vicintayan
Translation:
Since the Supreme Lord Krsna, who had appeared in the Dasarha dynasty, sees everything, He understood who the demon was. Still, the Lord pretended to accept the demon as a friend, while at the same time seriously considering how to kill him.