महाभारतः mahābhārataḥ - book-3, chapter-88, verse-27

आदिदेवो महायोगी यत्रास्ते मधुसूदनः ।
पुण्यानामपि तत्पुण्यं तत्र ते संशयोऽस्तु मा ॥२७॥

27. ādidevo mahāyogī yatrāste madhusūdanaḥ ,
puṇyānāmapi tatpuṇyaṁ tatra te saṁśayo'stu mā.

27. ādidevaḥ mahāyogī yatra āste madhusūdanaḥ
puṇyānām api tat puṇyam tatra te saṃśayaḥ astu mā

27. Where Madhusūdana (Vishnu/Krishna), the primeval deity and great yogi (yoga), resides, that place is sacred even among other sacred things. Let there be no doubt for you about that.

Words meanings summery:

• आदिदेवः (ādidevaḥ) - primeval deity, first god

• महायोगी (mahāyogī) - great yogi

• यत्र (yatra) - where, in which place

• आस्ते (āste) - resides, stays, sits

• मधुसूदनः (madhusūdanaḥ) - slayer of Madhu, Vishnu, Krishna

• पुण्यानाम् (puṇyānām) - of sacred things, of meritorious deeds

• अपि (api) - even, also, too

• तत् (tat) - that

• पुण्यम् (puṇyam) - sacred, meritorious

• तत्र (tatra) - there, in that place

• ते (te) - for you, to you, your

• संशयः (saṁśayaḥ) - doubt, uncertainty

• अस्तु (astu) - let it be, may it be

• मा (mā) - not, do not

Words meanings and morphology

आदिदेवः (ādidevaḥ) - primeval deity, first god

(noun)

Nominative, masculine, singular of ādideva

ādideva - primeval deity, first god, a name of Vishnu

Compound type : karmadhāraya (ādi+deva)

• ādi – first, primal, original
  adjective
• deva – god, deity, divine
  noun (masculine)

महायोगी (mahāyogī) - great yogi

(noun)

Nominative, masculine, singular of mahāyogin

mahāyogin - great yogi, great practitioner of yoga

Compound type : karmadhāraya (mahā+yogin)

• mahā – great, mighty
  adjective
• yogin – yogi, ascetic, one who practices yoga
  noun (masculine)

यत्र (yatra) - where, in which place

(indeclinable)

आस्ते (āste) - resides, stays, sits

(verb)

3rd person , singular, middle, present indicative (laṭ) of ās

root of class 2, middle voice

Root: ās (class 2)

मधुसूदनः (madhusūdanaḥ) - slayer of Madhu, Vishnu, Krishna

(proper noun)

Nominative, masculine, singular of madhusūdana

madhusūdana - slayer of the demon Madhu, an epithet of Vishnu or Krishna

Compound type : tatpuruṣa (madhu+sūdana)

• madhu – honey, sweet; name of a demon
  noun (masculine)
• sūdana – slayer, destroyer
  noun (masculine)
  Root: sūd (class 10)

पुण्यानाम् (puṇyānām) - of sacred things, of meritorious deeds

(adjective)

Genitive, neuter, plural of puṇya

puṇya - meritorious, virtuous, sacred, holy; merit, virtue

अपि (api) - even, also, too

(indeclinable)

तत् (tat) - that

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

पुण्यम् (puṇyam) - sacred, meritorious

(adjective)

Nominative, neuter, singular of puṇya

puṇya - meritorious, virtuous, sacred, holy; merit, virtue

तत्र (tatra) - there, in that place

(indeclinable)

ते (te) - for you, to you, your

(pronoun)

Dative, singular of tvad

tvad - you (pronoun)

Note: Can also be genitive, but dative fits 'let there be no doubt for you'.

संशयः (saṁśayaḥ) - doubt, uncertainty

(noun)

Nominative, masculine, singular of saṃśaya

saṁśaya - doubt, uncertainty, hesitation

Prefix: sam

Root: śī (class 2)

अस्तु (astu) - let it be, may it be

(verb)

3rd person , singular, active, imperative (loṭ) of as

root of class 2

Root: as (class 2)

मा (mā) - not, do not

(indeclinable)