Shiva Purana
यावद्वाराणसीन्दिव्याम्पुरीमेषां गमिष्यति ॥ तावत्त्वं भीषणे कालमनुगच्छोग्ररूपिणम् ॥ ६४ ॥
Until she goes to the divine city of Vārāṇasī you too shall follow her for a terribly long period.
english translation
yAvadvArANasIndivyAmpurImeSAM gamiSyati ॥ tAvattvaM bhISaNe kAlamanugacchograrUpiNam ॥ 64 ॥
hk transliteration by Sanscript