Srimad Bhagavatam Canto 06, Chapter 18, Text 72

SB 6.18.72

krtto me saptadha garbha
 asan sapta kumarakah
te ’pi caikaikaso vrknah
 saptadha napi mamrire
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
First I cut the child in the womb into seven pieces, which became seven children. Then I cut each of the children into seven pieces again. By the grace of the Supreme Lord, however, none of them died.
Srimad Bhagavatam Canto 06, Chapter 18, Text 71
Srimad Bhagavatam Canto 06, Chapter 18, Text 73