योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-186, verse-85

सुषुप्तस्वप्नयोर्भातः प्रकाशतमसी यथा ।
एकस्यामेव निद्रायां सर्गासर्गौ तथा परे ॥ ८५ ॥

suṣuptasvapnayorbhātaḥ prakāśatamasī yathā ,
ekasyāmeva nidrāyāṃ sargāsargau tathā pare 85

85. suṣuptasvapnayoḥ bhātaḥ prakāśatamasī yathā
ekasyām eva nidrāyām sargāsargau tathā pare

85. yathā prakāśatamasī suṣuptasvapnayoḥ bhātaḥ ekasyām eva nidrāyām,
tathā sargāsargau pare

85. Just as light and darkness become manifest in the states of deep sleep (suṣupti) and dreaming (svapna) within a single (overarching) sleep, similarly, creation (sarga) and non-creation (asarga) exist in the Supreme (para).

Words meanings summery:

• सुषुप्तस्वप्नयोः (suṣuptasvapnayoḥ) - in the states of deep sleep and dream (of deep sleep and dream)

• भातः (bhātaḥ) - become manifest (shining, manifested, appearing (dual))

• प्रकाशतमसी (prakāśatamasī) - light and darkness (light and darkness (dual))

• यथा (yathā) - just as (just as, as, in which way)

• एकस्याम् (ekasyām) - within a single (in one, in a single)

• एव (eva) - single (only, just, indeed, very)

• निद्रायाम् (nidrāyām) - sleep (in sleep)

• सर्गासर्गौ (sargāsargau) - creation (sarga) and non-creation (asarga) (creation and non-creation (dissolution))

• तथा (tathā) - similarly (similarly, so, thus)

• परे (pare) - in the Supreme (para) (in the Supreme, in the other)

Words meanings and morphology

सुषुप्तस्वप्नयोः (suṣuptasvapnayoḥ) - in the states of deep sleep and dream (of deep sleep and dream)

(noun)

Genitive, masculine, dual of suṣuptasvapna

suṣuptasvapna - deep sleep and dream

Compound type : dvandva (suṣupta+svapna)

• suṣupta – deep sleep, dreamless sleep (noun); deeply asleep (participle)
  noun (neuter)
  Past Passive Participle
  Derived from root √svap (to sleep) with prefix su-, meaning 'well', 'deeply'
  Prefix: su
  Root: svap (class 2)
• svapna – dream, sleep
  noun (masculine)
  Root: svap (class 2)

भातः (bhātaḥ) - become manifest (shining, manifested, appearing (dual))

(adjective)

Nominative, neuter, dual of bhāta

bhāta - shone, appeared, manifest, light

Past Passive Participle

Derived from root √bhā 'to shine'

Root: bhā (class 2)

प्रकाशतमसी (prakāśatamasī) - light and darkness (light and darkness (dual))

(noun)

Nominative, neuter, dual of prakāśatamasa

prakāśatamasa - light and darkness

Compound type : dvandva (prakāśa+tamasa)

• prakāśa – light, splendor, manifestation
  noun (masculine)
  From root √kāś 'to shine' with prefix pra-
  Prefix: pra
  Root: kāś (class 1)
• tamasa – darkness, gloom
  noun (neuter)

यथा (yathā) - just as (just as, as, in which way)

(indeclinable)

एकस्याम् (ekasyām) - within a single (in one, in a single)

(adjective)

Locative, feminine, singular of eka

eka - one, single, unique

एव (eva) - single (only, just, indeed, very)

(indeclinable)

Emphatic particle

निद्रायाम् (nidrāyām) - sleep (in sleep)

(noun)

Locative, feminine, singular of nidrā

nidrā - sleep, slumber

From root √drā 'to sleep' with prefix ni-

Prefix: ni

Root: drā (class 2)

सर्गासर्गौ (sargāsargau) - creation (sarga) and non-creation (asarga) (creation and non-creation (dissolution))

(noun)

Nominative, masculine, dual of sargāsarga

sargāsarga - creation and non-creation/dissolution

Compound type : dvandva (sarga+asarga)

• sarga – creation, emanation
  noun (masculine)
  From root √sṛj 'to emit, create'
  Root: sṛj (class 6)
• asarga – non-creation, dissolution, destruction
  noun (masculine)
  Negative particle 'a' + sarga

तथा (tathā) - similarly (similarly, so, thus)

(indeclinable)

परे (pare) - in the Supreme (para) (in the Supreme, in the other)

(adjective)

Locative, neuter, singular of para

para - supreme, higher, other, ultimate

Note: Here referring to the supreme reality (Brahman).