महाभारतः mahābhārataḥ - book-12, chapter-281, verse-10

स्वाध्यायेन महर्षिभ्यो देवेभ्यो यज्ञकर्मणा ।
पितृभ्यः श्राद्धदानेन नृणामभ्यर्चनेन च ॥१०॥

10. svādhyāyena maharṣibhyo devebhyo yajñakarmaṇā ,
pitṛbhyaḥ śrāddhadānena nṛṇāmabhyarcanena ca.

10. svādhyāyena maharṣibhyaḥ devebhyaḥ yajñakarmaṇā
pitṛbhyaḥ śrāddhadānena nṛṇām abhyarcanena ca

10. maharṣibhyaḥ svādhyāyena devebhyaḥ yajñakarmaṇā
pitṛbhyaḥ śrāddhadānena nṛṇām abhyarcanena ca

10. One fulfills obligations: to the great sages through self-study; to the gods through Vedic ritual (yajña) actions; to the ancestors through offerings for ancestors (śrāddha); and to human beings through honoring them.

Words meanings summery:

• स्वाध्यायेन (svādhyāyena) - by self-study, by recitation of sacred texts

• महर्षिभ्यः (maharṣibhyaḥ) - to the great sages, for the great seers

• देवेभ्यः (devebhyaḥ) - to the gods, for the gods

• यज्ञकर्मणा (yajñakarmaṇā) - by the act of Vedic ritual, by ritual action

• पितृभ्यः (pitṛbhyaḥ) - to the ancestors, for the fathers

• श्राद्धदानेन (śrāddhadānena) - by the offering of śrāddha, by ancestral offering

• नृणाम् (nṛṇām) - of men, of human beings

• अभ्यर्चनेन (abhyarcanena) - by honoring, by worshipping, by showing respect

• च (ca) - and, also

Words meanings and morphology

स्वाध्यायेन (svādhyāyena) - by self-study, by recitation of sacred texts

(noun)

Instrumental, masculine, singular of svādhyāya

svādhyāya - self-study, study of Vedas, recitation of sacred texts

From 'sva' (self) and 'adhyāya' (study)

Compound type : tatpurusha (sva+adhyāya)

• sva – self, own
  pronoun
• adhyāya – study, chapter, lesson
  noun (masculine)
  Prefix: adhi
  Root: i (class 2)

महर्षिभ्यः (maharṣibhyaḥ) - to the great sages, for the great seers

(noun)

Dative, masculine, plural of maharṣi

maharṣi - great sage, great seer

Compound type : karmadhāraya (mahā+ṛṣi)

• mahā – great, large
  adjective
• ṛṣi – sage, seer
  noun (masculine)

Note: Could also be ablative plural. Dative is more fitting for 'to'.

देवेभ्यः (devebhyaḥ) - to the gods, for the gods

(noun)

Dative, masculine, plural of deva

deva - god, deity

Root: div (class 4)

यज्ञकर्मणा (yajñakarmaṇā) - by the act of Vedic ritual, by ritual action

(noun)

Instrumental, neuter, singular of yajñakarman

yajñakarman - Vedic ritual action, sacrificial act

Compound type : tatpurusha (yajña+karman)

• yajña – Vedic ritual, offering, worship
  noun (masculine)
  From root yaj (to worship)
  Root: yaj (class 1)
• karman – action, deed, work, ritual
  noun (neuter)
  From root kṛ (to do)
  Root: kṛ (class 8)

पितृभ्यः (pitṛbhyaḥ) - to the ancestors, for the fathers

(noun)

Dative, masculine, plural of pitṛ

pitṛ - father, ancestor, progenitor

Note: Also ablative plural. Dative is better for 'to'.

श्राद्धदानेन (śrāddhadānena) - by the offering of śrāddha, by ancestral offering

(noun)

Instrumental, neuter, singular of śrāddhadāna

śrāddhadāna - offering of śrāddha, ancestral offering, giving of śrāddha

Compound type : tatpurusha (śrāddha+dāna)

• śrāddha – ancestral rite, obsequial ceremony, offering to ancestors
  noun (neuter)
• dāna – giving, gift, offering, donation
  noun (neuter)
  From root dā (to give)
  Root: dā (class 3)

नृणाम् (nṛṇām) - of men, of human beings

(noun)

Genitive, masculine, plural of nṛ

nṛ - man, human being, person

अभ्यर्चनेन (abhyarcanena) - by honoring, by worshipping, by showing respect

(noun)

Instrumental, neuter, singular of abhyarcana

abhyarcana - honoring, worshipping, respectful salutation

From root arc (to honor, worship) with prefix abhi

Prefix: abhi

Root: arc (class 1)

च (ca) - and, also

(indeclinable)