Shiva Purana
मानुष्यं च समासाद्य स्वर्गमोक्षप्रसाधनम् ॥ नाचरत्यात्मनः श्रेयस्स मृतश्शोचते चिरम् ॥ ३०॥
If anyone does not strive for salvation even after obtaining human birth which is capable of achieving heaven and salvation, surely he bemoans his lot for a long time, when dead.
english translation
mAnuSyaM ca samAsAdya svargamokSaprasAdhanam ॥ nAcaratyAtmanaH zreyassa mRtazzocate ciram ॥ 30॥
hk transliteration by Sanscript