Shiva Purana
मासिमासि यथान्यायं ब्रह्मकूर्चं प्रसाध्य तु ॥ स्नापयित्वा शिवं तेन पिबेच्छेषमुपोषितः ॥ ४ ॥
Every month he shall observe fast for a day and prepare Brahmakūrca. He shall perform the ablution of Śiva thereby and drink the residue.
english translation
mAsimAsi yathAnyAyaM brahmakUrcaM prasAdhya tu ॥ snApayitvA zivaM tena pibeccheSamupoSitaH ॥ 4 ॥
hk transliteration by Sanscript