Shiva Purana
एतेन क्रमयोगेन कल्पमन्वंतराणि च ॥ सप्रजानि व्यतीतानि शतशो ऽथ सहस्रशः ॥ १७ ॥
In this order, hundreds and thousands of such Kalpas and Manvantaras have passed by this time.
english translation
etena kramayogena kalpamanvaMtarANi ca ॥ saprajAni vyatItAni zatazo 'tha sahasrazaH ॥ 17 ॥
hk transliteration by Sanscript