Shiva Purana
यद्भूतं यच्च भव्यं यद्भविप्यत्सर्वमेव च ॥ मन्मयत्वादहं सर्वः सर्वो वै रुद्र इत्यपि ॥ २७ ॥
What is past, what is yet to be, what is present-all these are identical with me. Hence I am all. All is Rudra.
english translation
yadbhUtaM yacca bhavyaM yadbhavipyatsarvameva ca ॥ manmayatvAdahaM sarvaH sarvo vai rudra ityapi ॥ 27 ॥
hk transliteration by Sanscript