Shiva Purana
अध्रुवेण शरीरेण ध्रुवं यो न प्रसाधयेत् ॥ ध्रुवं तस्य परिभ्रष्टमध्रुवं नष्टमेव च ॥ ४० ॥
If anyone does not try to achieve the permanent through the non-permanent body, the permanent is lost for him and the non-permanent has already perished.
english translation
adhruveNa zarIreNa dhruvaM yo na prasAdhayet ॥ dhruvaM tasya paribhraSTamadhruvaM naSTameva ca ॥ 40 ॥
hk transliteration by Sanscript