Shiva Purana
स च तैः पीड्यमानो ऽपि तपः कुर्वन्कथञ्चन ॥ सदा नमः शिवायेति क्रोशति स्मार्तनादवत् ॥ ५७ ॥
Though harassed by them he somehow maintained his penance. He uttered “Namaḥ Śivāya” like one in great distress.
english translation
sa ca taiH pIDyamAno 'pi tapaH kurvankathaJcana ॥ sadA namaH zivAyeti krozati smArtanAdavat ॥ 57 ॥
hk transliteration by Sanscript