महाभारतः mahābhārataḥ - book-12, chapter-255, verse-8

नमस्कारेण हविषा स्वाध्यायैरौषधैस्तथा ।
पूजा स्याद्देवतानां हि यथा शास्त्रनिदर्शनम् ॥८॥

8. namaskāreṇa haviṣā svādhyāyairauṣadhaistathā ,
pūjā syāddevatānāṁ hi yathā śāstranidarśanam.

8. namaskāreṇa haviṣā svādhyāyaiḥ auṣadhaiḥ tathā
pūjā syāt devatānām hi yathā śāstranidarśanam

8. hi devatānām pūjā namaskāreṇa haviṣā svādhyāyaiḥ
tathā auṣadhaiḥ yathā śāstranidarśanam syāt

8. Indeed, the worship of the deities should be performed with salutations, oblations, Vedic recitation (svādhyāya), and medicinal herbs, in accordance with scriptural instructions.

Words meanings summery:

• नमस्कारेण (namaskāreṇa) - by salutation, by obeisance

• हविषा (haviṣā) - by oblation, with ghee

• स्वाध्यायैः (svādhyāyaiḥ) - by Vedic recitations, by self-study (svādhyāya)

• औषधैः (auṣadhaiḥ) - by medicinal herbs, by medicines

• तथा (tathā) - and, likewise, also, so

• पूजा (pūjā) - worship, adoration

• स्यात् (syāt) - should be, may be

• देवतानाम् (devatānām) - of the deities, of the gods

• हि (hi) - indeed, surely, because

• यथा (yathā) - as, just as, in accordance with

• शास्त्रनिदर्शनम् (śāstranidarśanam) - scriptural instruction, guidance from scripture

Words meanings and morphology

नमस्कारेण (namaskāreṇa) - by salutation, by obeisance

(noun)

Instrumental, masculine, singular of namaskāra

namaskāra - salutation, obeisance, worship, greeting

हविषा (haviṣā) - by oblation, with ghee

(noun)

Instrumental, neuter, singular of havis

havis - oblation, offering, ghee, butter

स्वाध्यायैः (svādhyāyaiḥ) - by Vedic recitations, by self-study (svādhyāya)

(noun)

Instrumental, masculine, plural of svādhyāya

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

औषधैः (auṣadhaiḥ) - by medicinal herbs, by medicines

(noun)

Instrumental, neuter, plural of auṣadha

auṣadha - medicinal herb, medicine, drug

तथा (tathā) - and, likewise, also, so

(indeclinable)

पूजा (pūjā) - worship, adoration

(noun)

Nominative, feminine, singular of pūjā

pūjā - worship, adoration, honor, reverence

स्यात् (syāt) - should be, may be

(verb)

3rd person , singular, active, optative (vidhiliṅ) of as

Root: as (class 2)

देवतानाम् (devatānām) - of the deities, of the gods

(noun)

Genitive, feminine, plural of devatā

devatā - deity, god, divinity

हि (hi) - indeed, surely, because

(indeclinable)

यथा (yathā) - as, just as, in accordance with

(indeclinable)

शास्त्रनिदर्शनम् (śāstranidarśanam) - scriptural instruction, guidance from scripture

(noun)

Nominative, neuter, singular of śāstranidarśana

śāstranidarśana - scriptural instruction, guidance according to sacred texts

Compound type : tatpuruṣa (śāstra+nidarśana)

• śāstra – sacred text, scripture, treatise, instruction
  noun (neuter)
• nidarśana – showing, indicating, example, illustration, instruction
  noun (neuter)
  Prefix: ni
  Root: dṛś (class 1)

Note: Can also be interpreted as an adverbial usage 'according to scriptural instruction'