Srimad Bhagavatam Canto 09, Chapter 09, Text 22

SB 9.9.22

pariveksyamanam bhagavan
 vilokyabhaksyam añjasa
rajanam asapat kruddho
 rakso hy evam bhavisyasi
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
While examining the food given to him, Vasistha Muni, by his mystic power, could understand that it was unfit to eat, being the flesh of a human being. He was very angry at this and immediately cursed Saudasa to become a man-eater.
Srimad Bhagavatam Canto 09, Chapter 09, Text 20-21
Srimad Bhagavatam Canto 09, Chapter 09, Text 23-24