योगवासिष्ठः yogavāsiṣṭhaḥ - book-2, chapter-13, verse-44

क्षयित्वात्सर्वभावानां स्वर्गमानुष्ययोर्द्वयोः ।
सुखं नास्त्येव सलिलं मृगतृष्णास्विवैतयोः ॥ ४४ ॥

kṣayitvātsarvabhāvānāṃ svargamānuṣyayordvayoḥ ,
sukhaṃ nāstyeva salilaṃ mṛgatṛṣṇāsvivaitayoḥ 44

44. kṣayitvāt sarva-bhāvānām svarga-mānuṣyayoḥ dvayoḥ |
sukham na asti eva salilam mṛgatṛṣṇāsu iva etayoḥ ||

44. sarva-bhāvānām kṣayitvāt svarga-mānuṣyayoḥ dvayoḥ
sukham na asti eva mṛgatṛṣṇāsu salilam iva etayoḥ

44. Due to the perishable nature of all states of being, happiness simply does not exist in both heavenly and human realms, just as there is no water in the mirages of these two worlds.

Words meanings summery:

• क्षयित्वात् (kṣayitvāt) - due to perishability, because of destructibility, from decay

• सर्व-भावानाम् (sarva-bhāvānām) - of all existences, of all states of being

• स्वर्ग-मानुष्ययोः (svarga-mānuṣyayoḥ) - in both heaven and human existence, of heaven and human existence

• द्वयोः (dvayoḥ) - in both (heavenly and human realms) (of two, in two, both)

• सुखम् (sukham) - happiness, pleasure

• न (na) - not, no

• अस्ति (asti) - is, exists

• एव (eva) - indeed, certainly, only, just

• सलिलम् (salilam) - water

• मृगतृष्णासु (mṛgatṛṣṇāsu) - in mirages

• इव (iva) - like, as, as if

• एतयोः (etayoḥ) - of these two (realms, i.e., heavenly and human) (of these two)

Words meanings and morphology

क्षयित्वात् (kṣayitvāt) - due to perishability, because of destructibility, from decay

(noun)

Ablative, neuter, singular of kṣayitva

kṣayitva - perishability, destructibility

Derived from kṣaya (decay) + tva (abstract suffix)

Root: kṣi (class 1)

सर्व-भावानाम् (sarva-bhāvānām) - of all existences, of all states of being

(noun)

Genitive, masculine, plural of sarva-bhāva

sarva-bhāva - all existences, every state of being

Compound type : karma-dhāraya (sarva+bhāva)

• sarva – all, every, whole
  adjective (masculine)
• bhāva – state of being, existence, nature, emotion
  noun (masculine)
  From root bhū (to be) + a (suffix)
  Root: bhū (class 1)

स्वर्ग-मानुष्ययोः (svarga-mānuṣyayoḥ) - in both heaven and human existence, of heaven and human existence

(noun)

Locative, neuter, dual of svarga-mānuṣya

svarga-mānuṣya - heaven and human existence

Compound type : dvandva (svarga+mānuṣya)

• svarga – heaven, paradise
  noun (masculine)
• mānuṣya – humanity, human existence
  noun (neuter)
  Derived from manuṣya (human) + ya (suffix)

Note: Also possible as genitive dual, but locative fits the context better (happiness in these realms).

द्वयोः (dvayoḥ) - in both (heavenly and human realms) (of two, in two, both)

(numeral)

Note: Could also be genitive dual, but locative is more suitable for 'in both'.

सुखम् (sukham) - happiness, pleasure

(noun)

Nominative, neuter, singular of sukha

sukha - happiness, pleasure, comfort

Note: It is the subject of 'na asti'.

न (na) - not, no

(indeclinable)

अस्ति (asti) - is, exists

(verb)

3rd person , singular, active, present (laṭ) of as

Root: as (class 2)

एव (eva) - indeed, certainly, only, just

(indeclinable)

सलिलम् (salilam) - water

(noun)

Nominative, neuter, singular of salila

salila - water, liquid

Note: Subject in the simile.

मृगतृष्णासु (mṛgatṛṣṇāsu) - in mirages

(noun)

Locative, feminine, plural of mṛgatṛṣṇā

mṛgatṛṣṇā - mirage (literally 'deer's thirst')

Compound type : tatpuruṣa (mṛga+tṛṣṇā)

• mṛga – deer, animal
  noun (masculine)
  Root: mṛg (class 2)
• tṛṣṇā – thirst, craving, desire
  noun (feminine)
  From root tṛṣ (to thirst)
  Root: tṛṣ

इव (iva) - like, as, as if

(indeclinable)

एतयोः (etayoḥ) - of these two (realms, i.e., heavenly and human) (of these two)

(pronoun)

Genitive, neuter, dual of etad

etad - this, these

Note: Could also be locative dual, but genitive 'of these two' fits better with 'mirages of these two'.