Shiva Purana
वामचारं यदा देवि ह्यष्टादशदिनावधिः ॥ जीवितं चाष्टमासं तु घस्रा द्वादश कीर्तिताः ॥ ६५ ॥
O goddess, if for eighteen days he lives for eight months and twelve days.
english translation
vAmacAraM yadA devi hyaSTAdazadinAvadhiH ॥ jIvitaM cASTamAsaM tu ghasrA dvAdaza kIrtitAH ॥ 65 ॥
hk transliteration by Sanscript