Isha Upanishad Verse 17
Sanskrit Verse
वायुरनिलममृतमथेदं भस्मान्तं शरीरम् ।
ॐ कतो स्मर कृतं स्मर कतो स्मर कृतं स्मर ॥१७॥
Transliteration
vāyuranilamamṛtamathā’yaṁ bhasmāntaṁ śarīram,
oṁ krato smara kṛtaṁ smara krato smara kṛtaṁ smara. (Note: krato vs krito in user text, search says krato)
Sri Aurobindo's translation
The Breath of things is an immortal Life, but of this body ashes are the end. OM! O Will, remember, that which was done remember! O Will, remember, that which was done remember.

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