Shiva Purana
कोटिरुद्रं त्रिगुणितमेकादशसहस्रकम् । सहस्रकोटिरुद्रा ख्यमुदितं ग्रंथसंख्यया ५४ ।
The Koṭirudra saṃhitā consisted of nine thousand verses; the Sahasrakoṭi-Rudra saṃhitā of eleven thousand verses.
english translation
koTirudraM triguNitamekAdazasahasrakam । sahasrakoTirudrA khyamuditaM graMthasaMkhyayA 54 ।
hk transliteration by Sanscript