Shiva Purana
यस्या साधारणं शंभुनाम्नि भक्तिरखंडिता । तस्यैव मोक्षः सुलभो नान्यस्येति मतिर्मम ३५ ।
Salvation is easy of access only to him who has extraordinary and unbroken devotion for the names of Śiva. I believe in this.
english translation
yasyA sAdhAraNaM zaMbhunAmni bhaktirakhaMDitA । tasyaiva mokSaH sulabho nAnyasyeti matirmama 35 ।
hk transliteration by Sanscript