Shiva Purana
ईश्वर उवाच ॥ आश्रित्य परमां विद्यां हृद्यां पञ्चाक्षरीं मम ॥ भक्त्या च भावितात्मानो मुच्यंते कलिजा नराः ॥ ४ ॥
Lord Śiva said:— Men of the Kali age are liberated when their souls are purified by devotion after resorting to my pleasing Mantra of five syllables.
english translation
Izvara uvAca ॥ Azritya paramAM vidyAM hRdyAM paJcAkSarIM mama ॥ bhaktyA ca bhAvitAtmAno mucyaMte kalijA narAH ॥ 4 ॥
hk transliteration by Sanscript