Śrīmad-Bhāgavatam · Text 6.19.21
Who is speaking and story frame
एतेन पूजाविधिना मासान् द्वादश हायनम् ।
नीत्वाथोपरमेत्साध्वी कार्तिके चरमेऽहनि ॥ २१ ॥
etena pūjā-vidhinā
māsān dvādaśa hāyanam
nītvāthoparamet sādhvī
kārtike carame ’hani
The chaste wife must perform such devotional service continuously for one year. After one year passes, she should fast on the full-moon day in the month of Kārttika [October-November].
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.