Srimad Bhagavatam Canto 10, Chapter 64, Text 24

SB 10.64.24

purvam devasubham bhuñja
 iti praha pateti sah
tavad adraksam atmanam
 krkalasam patan prabho
 
Translation: 
 
I replied, “First, my lord, let me suffer my sinful reactions,” and Yamaraja said, “Then fall!” At once I fell, and while falling I saw myself becoming a lizard, O master.
Srimad Bhagavatam Canto 10, Chapter 64, Text 23
Srimad Bhagavatam Canto 10, Chapter 64, Text 25