Srimad Bhagavatam Canto 01, Chapter 07, Text 38

SB 1.7.38

pratisrutam ca bhavata
pañcalyai srnvato mama
aharisye siras tasya
yas te manini putra-ha
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Furthermore, I have personally heard you promise Draupadi that you would bring forth the head of the killer of her sons.
 
Srimad Bhagavatam Canto 01, Chapter 07, Text 37
Srimad Bhagavatam Canto 01, Chapter 07, Text 39