Shiva Purana
श्रीशिवाय नमस्तुभ्यं मुखं व्याहरते यदा । तन्मुखं पावनं तीर्थं सर्वपापविनाशनम् ७ ।
When a mouth utters “Obeisance to Thee, holy Śiva” that mouth (face) is on a par with holy centres destroying all sins.
english translation
zrIzivAya namastubhyaM mukhaM vyAharate yadA । tanmukhaM pAvanaM tIrthaM sarvapApavinAzanam 7 ।
hk transliteration by Sanscript