Shiva Purana
ब्रह्मादि तृणपर्यंतं यत्किंचिद्दृश्यते त्विह ॥ तत्सर्वं शिव एवास्ति मिथ्या नानात्वकल्पना ॥ १९ ॥
Whatever is seen here beginning with Brahmā is Śiva himself. The concept of manifoldness is unreal.
english translation
brahmAdi tRNaparyaMtaM yatkiMciddRzyate tviha ॥ tatsarvaM ziva evAsti mithyA nAnAtvakalpanA ॥ 19 ॥
hk transliteration by Sanscript