Srimad Bhagavatam Canto 10, Chapter 78, Text 33

SB 10.78.33

sri-bhagavan uvaca
carisye vadha-nirvesam
 lokanugraha-kamyaya
niyamah prathame kalpe
 yavan sa tu vidhiyatam
 
Translation: 
 
The Personality of Godhead said: I will certainly perform the atonement for this killing, since I wish to show compassion to the people in general. Please, therefore, prescribe for Me whatever ritual is to be done first.
Srimad Bhagavatam Canto 10, Chapter 78, Text 31-32
Srimad Bhagavatam Canto 10, Chapter 78, Text 34