योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-153, verse-19

यस्याहमवसं संविन्मात्रकं हृदयौजसि ।
असौ मया सह गतः किलाशेषेण भस्मसात् ॥ १९ ॥

yasyāhamavasaṃ saṃvinmātrakaṃ hṛdayaujasi ,
asau mayā saha gataḥ kilāśeṣeṇa bhasmasāt 19

19. yasya aham avasam saṃvinmātrakam hṛdayaujasi
asau mayā saha gataḥ kila aśeṣeṇa bhasmasāt

19. aham saṃvinmātrakam yasya hṛdayaujasi avasam
asau mayā saha aśeṣeṇa bhasmasāt gataḥ kila

19. The one (or that reality) in whose heart's (hṛdaya) vital power I, as mere consciousness (saṃvit), resided, has, it is said, entirely turned to ashes, along with me.

Words meanings summery:

• यस्य (yasya) - whose, of which

• अहम् (aham) - I

• अवसम् (avasam) - I dwelled, I resided

• संविन्मात्रकम् (saṁvinmātrakam) - consisting merely of consciousness, only consciousness

• हृदयौजसि (hṛdayaujasi) - in the heart's energy/radiance/vigor

• असौ (asau) - Refers to the entity or principle mentioned by 'yasya' (whose). (that (one, masculine))

• मया (mayā) - by me, with me

• सह (saha) - with, along with

• गतः (gataḥ) - gone, departed, reached

• किल (kila) - indeed, it is said, reputedly

• अशेषेण (aśeṣeṇa) - completely, entirely, without remainder

• भस्मसात् (bhasmasāt) - reduced to ashes, becoming ashes

Words meanings and morphology

यस्य (yasya) - whose, of which

(pronoun)

Genitive, masculine/neuter, singular of yad

yad - which, what, that

अहम् (aham) - I

(pronoun)

Nominative, singular of aham

aham - I

अवसम् (avasam) - I dwelled, I resided

(verb)

1st person , singular, active, past imperfect (laṅ) of vas

imperfect (laṅ), 1st person singular

from root vas (class 1)

Root: vas (class 1)

संविन्मात्रकम् (saṁvinmātrakam) - consisting merely of consciousness, only consciousness

(adjective)

neuter, singular of saṃvinmātraka

saṁvinmātraka - consisting merely of consciousness

compound of saṃvid and mātraka

Compound type : karmadhāraya (saṃvid+mātraka)

• saṃvid – consciousness, knowledge, understanding
  noun (feminine)
  from sam + vid (to know)
  Prefix: sam
  Root: VID (class 2)
• mātraka – only, mere, consisting of
  adjective (neuter)
  from mātra with suffix -ka

Note: Qualifies 'aham' (I) implicitly, referring to the state of being only consciousness.

हृदयौजसि (hṛdayaujasi) - in the heart's energy/radiance/vigor

(noun)

Locative, neuter, singular of hṛdayojas

hṛdayojas - heart's energy, heart's splendor, vital power of the heart

compound of hṛdaya and ojas

Compound type : tatpuruṣa (hṛdaya+ojas)

• hṛdaya – heart, mind, center, essence
  noun (neuter)
• ojas – vigor, energy, strength, splendor, light
  noun (neuter)

असौ (asau) - Refers to the entity or principle mentioned by 'yasya' (whose). (that (one, masculine))

(pronoun)

Nominative, masculine, singular of adas

adas - that, yonder

मया (mayā) - by me, with me

(pronoun)

Instrumental, singular of aham

aham - I

Note: Used with 'saha' (with).

सह (saha) - with, along with

(indeclinable)

गतः (gataḥ) - gone, departed, reached

(adjective)

Nominative, masculine, singular of gata

gata - gone, gone to, reached, become

Past Passive Participle

from root GAM with suffix -kta

Root: GAM (class 1)

किल (kila) - indeed, it is said, reputedly

(indeclinable)

अशेषेण (aśeṣeṇa) - completely, entirely, without remainder

(adjective)

Instrumental, masculine/neuter, singular of aśeṣa

aśeṣa - entire, complete, without remainder

negative compound (na śeṣa)

Compound type : nañ-tatpuruṣa (a+śeṣa)

• a – not, non
  indeclinable
  negative prefix
• śeṣa – remainder, rest, remnant
  noun (masculine)
  from root ŚIṢ
  Root: ŚIṢ (class 7)

भस्मसात् (bhasmasāt) - reduced to ashes, becoming ashes

(indeclinable)

formed from bhasman (ashes) with the suffix -sāt, indicating transformation or 'becoming'