योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-38, verse-34

अश्वमेधसहस्रस्य फलं प्राप्नोति मानवः ।
ध्यानवल्युपहारेण स्वयमात्मानमात्मना ॥ ३४ ॥

aśvamedhasahasrasya phalaṃ prāpnoti mānavaḥ ,
dhyānavalyupahāreṇa svayamātmānamātmanā 34

34. aśvamedha-sahasrasya phalam prāpnoti mānavaḥ
dhyāna-vali-upahāreṇa svayam ātmānam ātmanā

34. mānavaḥ dhyāna-vali-upahāreṇa ātmanā svayam
ātmānam aśvamedha-sahasrasya phalam prāpnoti

34. A person (mānava) attains the merit of a thousand horse sacrifices (aśvamedha yajñas) by offering their own self (ātman) through meditative devotion (dhyāna), by means of the self (ātman).

Words meanings summery:

• अश्वमेध-सहस्रस्य (aśvamedha-sahasrasya) - of a thousand horse sacrifices

• फलम् (phalam) - fruit, result, consequence, merit

• प्राप्नोति (prāpnoti) - obtains, attains, reaches

• मानवः (mānavaḥ) - a human being, a person

• ध्यान-वलि-उपहारेण (dhyāna-vali-upahāreṇa) - by the offering of devotion in the form of meditation

• स्वयम् (svayam) - oneself, by oneself, personally

• आत्मानम् (ātmānam) - the self, soul, spirit

• आत्मना (ātmanā) - by the self, through the soul

Words meanings and morphology

अश्वमेध-सहस्रस्य (aśvamedha-sahasrasya) - of a thousand horse sacrifices

(noun)

Genitive, neuter, singular of aśvamedha-sahasra

aśvamedha-sahasra - a thousand horse sacrifices

Compound type : tatpuruṣa (aśvamedha+sahasra)

• aśvamedha – horse sacrifice (a Vedic ritual)
  noun (masculine)
• sahasra – a thousand
  noun (neuter)

फलम् (phalam) - fruit, result, consequence, merit

(noun)

Accusative, neuter, singular of phala

phala - fruit, result, consequence, reward, merit

प्राप्नोति (prāpnoti) - obtains, attains, reaches

(verb)

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

Prefix: pra

Root: āp (class 5)

मानवः (mānavaḥ) - a human being, a person

(noun)

Nominative, masculine, singular of mānava

mānava - human, human being, man; descendant of Manu

ध्यान-वलि-उपहारेण (dhyāna-vali-upahāreṇa) - by the offering of devotion in the form of meditation

(noun)

Instrumental, masculine, singular of dhyāna-vali-upahāra

dhyāna-vali-upahāra - an offering of devotion in the form of meditation

Compound type : tatpuruṣa (dhyāna+bali+upahāra)

• dhyāna – meditation, contemplation, thought
  noun (neuter)
  Action noun
  Derived from root 'dhyāi' (to meditate)
  Root: dhyāi (class 1)
• bali – offering, tribute, oblation, tax
  noun (masculine)
• upahāra – offering, gift, present, tribute
  noun (masculine)
  Action noun
  Derived from root 'hṛ' with upasargas 'upa-ā'
  Prefixes: upa+ā
  Root: hṛ (class 1)

स्वयम् (svayam) - oneself, by oneself, personally

(indeclinable)

आत्मानम् (ātmānam) - the self, soul, spirit

(noun)

Accusative, masculine, singular of ātman

ātman - self, soul, spirit, individual soul (ātman), essence

आत्मना (ātmanā) - by the self, through the soul

(noun)

Instrumental, masculine, singular of ātman

ātman - self, soul, spirit, individual soul (ātman), essence