Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 1
Sanskrit:
श्रीशुक उवाचएवं गतेऽथ सुद्युम्ने मनुर्वैवस्वत: सुते ।पुत्रकामस्तपस्तेपे यमुनायां शतं समा: ॥ १ ॥
ITRANS:
śrī-śuka uvācaevaṁ gate ’tha sudyumnemanur vaivasvataḥ suteputra-kāmas tapas tepeyamunāyāṁ śataṁ samāḥ
Translation:
Śukadeva Gosvāmī said: Thereafter, when his son Sudyumna had thus gone to the forest to accept the order of vānaprastha, Vaivasvata Manu [Śrāddhadeva], being desirous of getting more sons, performed severe austerities on the bank of the Yamunā for one hundred years.