One verse

Srimad Bhagavatam 9.2.1

9.2.1

श्रीशुक उवाच एवं गतेऽथ सुद्युम्ने मनुर्वैवस्वत: सुते । पुत्रकामस्तपस्तेपे यमुनायां शतं समा: ॥ १ ॥

sri-suka uvaca evam gate ’tha sudyumne manur vaivasvatah sute putra-kamas tapas tepe yamunayam satam samah

sri-sukah uvaca
Sri Sukadeva Gosvami said
evam
thus
gate
had accepted the order of vanaprastha
atha
thereafter
sudyumne
when Sudyumna
manuh vaivasvatah
Vaivasvata Manu, known as Sraddhadeva
sute
his son
putra-kamah
desiring to get sons
tapah tepe
executed severe austerities
yamunayam
on the bank of the Yamuna
satam samah
for one hundred years.

Sukadeva Gosvami said: Thereafter, when his son Sudyumna had thus gone to the forest to accept the order of vanaprastha, Vaivasvata Manu (Sraddhadeva), being desirous of getting more sons, performed severe austerities on the bank of the Yamuna for one hundred years.