Shiva Purana
सदाशिवो विलीयेत मुक्तो विरहमेव च ॥ ज्ञानमूलन्तथाध्यात्म्यं तस्य भक्तिश्शिवस्य च ॥ ३३ ॥
Sadashiva will dissolve and be liberated from separation. His devotion to Lord Śiva is the root of knowledge and spirituality.
english translation
sadAzivo vilIyeta mukto virahameva ca ॥ jJAnamUlantathAdhyAtmyaM tasya bhaktizzivasya ca ॥ 33 ॥
hk transliteration by Sanscript