Shiva Purana
भक्त्या पञ्चाक्षरेणैव यः शिवं सकृदर्चयेत् ॥ सोपि गच्छेच्छिवस्थानं शिवमन्त्रस्य गौरवात् ॥ ६ ॥
He who worships Śiva even once with devotion repeating the five-syllabled mantra goes to the abode of Śiva due to the efficacy of the mantra of Śiva.
english translation
bhaktyA paJcAkSareNaiva yaH zivaM sakRdarcayet ॥ sopi gacchecchivasthAnaM zivamantrasya gauravAt ॥ 6 ॥
hk transliteration by Sanscript