Shiva Purana
गंगायां च ततः स्नात्वा पुनश्चैव भविष्यति ॥ पुरा दश तथा चैकं गिरेस्त्वं क्रमणं कुरु ॥ ५४ ॥
At the outset, you circumambulate this mountain eleven times. Taking bath in Gaṅgā you will become pure thereafter.
english translation
gaMgAyAM ca tataH snAtvA punazcaiva bhaviSyati ॥ purA daza tathA caikaM girestvaM kramaNaM kuru ॥ 54 ॥
hk transliteration by Sanscript