Śrīmad-Bhāgavatam · Text 8.16.48
Who is speaking and story frame
प्रतिपद्दिनमारभ्य यावच्छुक्लत्रयोदशीम् ।
ब्रह्मचर्यमध:स्वप्नं स्नानं त्रिषवणं चरेत् ॥ ४८ ॥
pratipad-dinam ārabhya
yāvac chukla-trayodaśīm
brahmacaryam adhaḥ-svapnaṁ
snānaṁ tri-ṣavaṇaṁ caret
From pratipat until the thirteenth day of the next bright moon [śukla-trayodaśī], one should observe complete celibacy, sleep on the floor, bathe three times a day and thus execute the vow.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.