Śrīmad-Bhāgavatam · Text 10.78.40
Who is speaking and story frame
ततश्च भारतं वर्षं परीत्य सुसमाहित: ।
चरित्वा द्वादश मासांस्तीर्थस्नायी विशुध्यसि ॥ ४० ॥
tataś ca bhārataṁ varṣaṁ
parītya su-samāhitaḥ
caritvā dvādaśa-māsāṁs
tīrtha-snāyī viśudhyasi
Thereafter, for twelve months, You should circumambulate the land of Bhārata in a mood of serious meditation, executing austerities and bathing at various holy pilgrimage sites. In this way You will become purified.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.