महाभारतः mahābhārataḥ - book-12, chapter-210, verse-18

विधिज्ञेभ्यो द्विजातिभ्यो ग्राह्यमन्नं विशिष्यते ।
आहारनियमेनास्य पाप्मा नश्यति राजसः ॥१८॥

18. vidhijñebhyo dvijātibhyo grāhyamannaṁ viśiṣyate ,
āhāraniyamenāsya pāpmā naśyati rājasaḥ.

18. vidhijñebhyaḥ dvijātibhyaḥ grāhyam annam
viśiṣyate āhāraniyamena asya pāpmā naśyati rājasaḥ

18. vidhijñebhyaḥ dvijātibhyaḥ grāhyam annam
viśiṣyate asya āhāraniyamena rājasaḥ pāpmā naśyati

18. Food that is accepted from twice-born (dvijāti) individuals who are knowledgeable in rituals (vidhijña) is considered superior. Through the regulation of one's diet, one's passion-born (rajas) impurity is destroyed.

Words meanings summery:

• विधिज्ञेभ्यः (vidhijñebhyaḥ) - to the ritual-knowing, to the experts in rules

• द्विजातिभ्यः (dvijātibhyaḥ) - to the twice-born

• ग्राह्यम् (grāhyam) - acceptable, to be taken, receivable

• अन्नम् (annam) - food, meal, grain

• विशिष्यते (viśiṣyate) - is distinguished, excels, is superior

• आहारनियमेन (āhāraniyamena) - by the regulation of diet

• अस्य (asya) - his, of this (person)

• पाप्मा (pāpmā) - sin, evil, impurity

• नश्यति (naśyati) - perishes, is destroyed, disappears

• राजसः (rājasaḥ) - of rajas, passionate, born of passion

Words meanings and morphology

विधिज्ञेभ्यः (vidhijñebhyaḥ) - to the ritual-knowing, to the experts in rules

(adjective)

Dative, masculine, plural of vidhijña

vidhijña - knowing rules, expert in sacred rites

Compound type : tatpuruṣa (vidhi+jña)

• vidhi – rule, ritual, ordinance, method
  noun (masculine)
• jña – knowing, conversant with, expert
  adjective (masculine)
  derived from root jñā (to know)
  Root: jñā (class 9)

द्विजातिभ्यः (dvijātibhyaḥ) - to the twice-born

(noun)

Dative, masculine, plural of dvijāti

dvijāti - twice-born (Brahmin, Kshatriya, Vaishya)

Compound type : bahuvrīhi (dvi+jāti)

• dvi – two
  numeral
• jāti – birth, origin, species, caste
  noun (feminine)

ग्राह्यम् (grāhyam) - acceptable, to be taken, receivable

(adjective)

Nominative, neuter, singular of grāhya

grāhya - to be taken, to be received, acceptable

Gerundive

formed from root grah with suffix -ya

Root: grah (class 9)

अन्नम् (annam) - food, meal, grain

(noun)

Nominative, neuter, singular of anna

anna - food, meal, grain

विशिष्यते (viśiṣyate) - is distinguished, excels, is superior

(verb)

3rd person , singular, middle, present (laṭ) of viśiṣ

passive/middle voice from root śiṣ with prefix vi

Prefix: vi

Root: śiṣ (class 7)

आहारनियमेन (āhāraniyamena) - by the regulation of diet

(noun)

Instrumental, masculine, singular of āhāraniyama

āhāraniyama - regulation of diet, dietary control

Compound type : tatpuruṣa (āhāra+niyama)

• āhāra – food, diet, taking in
  noun (masculine)
• niyama – control, restraint, rule, discipline
  noun (masculine)

अस्य (asya) - his, of this (person)

(pronoun)

Genitive, masculine, singular of idam

idam - this, he, she, it

पाप्मा (pāpmā) - sin, evil, impurity

(noun)

Nominative, masculine, singular of pāpman

pāpman - sin, evil, vice, impurity

नश्यति (naśyati) - perishes, is destroyed, disappears

(verb)

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

Root: naś (class 4)

राजसः (rājasaḥ) - of rajas, passionate, born of passion

(adjective)

Nominative, masculine, singular of rājasa

rājasa - relating to rajas, passionate, born of rajas