Shiva Purana
॥ क्वचित्सिंहैर्वृकैर्व्याघ्रैर्मशकैश्च सुदारुणैः ॥ क्वचिन्महाजलौकाभिः क्वचिच्चाजगरैस्तथा॥ १६॥
Different places are infested with different terrible beasts of prey such as lions, wolves, tigers and huge pythons or terrible mosquitoes or huge leeches.
english translation
॥ kvacitsiMhairvRkairvyAghrairmazakaizca sudAruNaiH ॥ kvacinmahAjalaukAbhiH kvaciccAjagaraistathA॥ 16॥
hk transliteration by Sanscript