Srimad Bhagavatam Canto 06, Chapter 14, Text 44

SB 6.14.44

krtadyutir ajananti
 sapatninam agham mahat
supta eveti sañcintya
 niriksya vyacarad grhe
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Unaware of the poison administered by her co-wives, Queen Krtadyuti walked within the house, thinking that her son was sleeping deeply. She did not understand that he was dead.
Srimad Bhagavatam Canto 06, Chapter 14, Text 43
Srimad Bhagavatam Canto 06, Chapter 14, Text 45