SB 7.7.13
tathety avatsid devarser
antike sakuto-bhaya
yavad daitya-patir ghorat
tapaso na nyavartata
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
After accepting the instructions of Devarsi Narada, my mother stayed in his care, without fear from any direction, as long as my father, the King of the Daityas, had not become free from his severe austerities.