Shiva Purana
अयं स्वरूपमंशेन धृत्वा शंभुः पुनः स्थितः ॥ शरणेश्वरविख्यातो लोकानां सुखदः सदा ॥ २५॥
Śiva assumed his form partially and became famous as Śaraṇeśvara. He is the bestower of happiness to all the worlds always.
english translation
ayaM svarUpamaMzena dhRtvA zaMbhuH punaH sthitaH ॥ zaraNezvaravikhyAto lokAnAM sukhadaH sadA ॥ 25॥
hk transliteration by Sanscript