Shiva Purana
स शिवस्सर्वमेवेदमधिष्ठाय स्वशक्तिभिः ॥ अप्रच्युतस्स्वतो भावः स्थितः स्थाणुरतः स्मृतः ॥ १० ॥
Presiding over everything by means of his Śaktis, he is stationed without dropping his intrinsic nature. Hence he is known as Śiva.
english translation
sa zivassarvamevedamadhiSThAya svazaktibhiH ॥ apracyutassvato bhAvaH sthitaH sthANurataH smRtaH ॥ 10 ॥
hk transliteration by Sanscript