Shiva Purana
पुराणानाञ्च संक्षिप्तं चतुर्लक्षप्रमाणतः ॥ अद्यापि देवलोके तच्छतकोटिप्रविस्तरम् ॥ ३८ ॥
Purāṇas extending to a hundred crore Ślokas were condensed by him into four hundred thousand Ślokas. Even now in the Devaloka they have the original number.
english translation
purANAnAJca saMkSiptaM caturlakSapramANataH ॥ adyApi devaloke tacchatakoTipravistaram ॥ 38 ॥
hk transliteration by Sanscript