Srimad Bhagavatam Canto 06, Chapter 18, Text 68

SB 6.18.68

ditir utthaya dadrse
 kumaran anala-prabhan
indrena sahitan devi
 paryatusyad anindita
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Because of worshiping the Supreme Personality of Godhead, Diti was completely purified. When she got up from bed, she saw her forty-nine sons along with Indra. These forty-nine sons were all as brilliant as fire and were in friendship with Indra, and therefore she was very pleased.
Srimad Bhagavatam Canto 06, Chapter 18, Text 66-67
Srimad Bhagavatam Canto 06, Chapter 18, Text 69