Srimad-Bhagavatam: Canto 6 - Chapter 1 - Verse 69
Sanskrit:
अथेन्द्रमाह ताताहमादित्यानां भयावहम् ।अपत्यमिच्छन्त्यचरं व्रतमेतत्सुदुष्करम् ॥ ६९ ॥
ITRANS:
athendram āha tātāhamādityānāṁ bhayāvahamapatyam icchanty acaraṁvratam etat suduṣkaram
Translation:
Thereafter, Diti said to Indra: My dear son, I adhered to this difficult vow just to get a son to kill you twelve Ādityas.