Shiva Purana
व्यासेन तत्तु संक्षिप्तं चतुर्विंशत्सहस्रकम् । शैवं तत्र चतुर्थं वै पुराणं सप्तसंहितम् ५६ ।
That has been condensed by Vyāsa to twenty-four thousand verses; that is to about a fourth of the original Purāṇa and he retained seven saṃhitās.
english translation
vyAsena tattu saMkSiptaM caturviMzatsahasrakam । zaivaM tatra caturthaM vai purANaM saptasaMhitam 56 ।
hk transliteration by Sanscript