महाभारतः mahābhārataḥ - book-1, chapter-56, verse-29

यश्चेदं श्रावयेच्छ्राद्धे ब्राह्मणान्पादमन्ततः ।
अक्षय्यं तस्य तच्छ्राद्धमुपतिष्ठेत्पितॄनपि ॥२९॥

29. yaścedaṁ śrāvayecchrāddhe brāhmaṇānpādamantataḥ ,
akṣayyaṁ tasya tacchrāddhamupatiṣṭhetpitṝnapi.

29. yaḥ ca idam śrāvayet śrāddhe brāhmaṇān pādam antataḥ
अक्षय्यम् तस्य तत् श्राद्धम् उपतिष्ठेत् पितॄन् अपि

29. And he who recites even a quarter of this (narrative) to Brahmins at a Śrāddha ceremony—for him, that Śrāddha becomes imperishable and reaches even his ancestors.

Words meanings summery:

• यः (yaḥ) - he who (who, which)

• च (ca) - and (and, also)

• इदम् (idam) - this (narrative/Mahabharata) (this)

• श्रावयेत् (śrāvayet) - recites, causes to be heard (may cause to hear, should recite)

• श्राद्धे (śrāddhe) - at a Śrāddha ceremony (at a Śrāddha ceremony, in faith)

• ब्राह्मणान् (brāhmaṇān) - to Brahmins (Brahmins)

• पादम् (pādam) - a quarter (of the text) (a quarter, a foot, a part)

• अन्ततः (antataḥ) - at least (lastly, at the end, at least)

• अक्षय्यम् (akṣayyam) - imperishable, yielding inexhaustible results (imperishable, inexhaustible)

• तस्य (tasya) - for him (of him, for him)

• तत् (tat) - that (Śrāddha) (that, it)

• श्राद्धम् (śrāddham) - Śrāddha offering/rite (Śrāddha ceremony, offering)

• उपतिष्ठेत् (upatiṣṭhet) - becomes effective, reaches (the ancestors) (may stand by, may attend, may become effective, may reach)

• पितॄन् (pitṝn) - ancestors (ancestors, fathers)

• अपि (api) - even (also, even, too)

Words meanings and morphology

यः (yaḥ) - he who (who, which)

(pronoun)

Nominative, masculine, singular of yad

yad - which, who, what

Note: relative pronoun

च (ca) - and (and, also)

(indeclinable)

Note: Conjunction

इदम् (idam) - this (narrative/Mahabharata) (this)

(pronoun)

Accusative, neuter, singular of idam

idam - this, this here

Note: demonstrative pronoun

श्रावयेत् (śrāvayet) - recites, causes to be heard (may cause to hear, should recite)

(verb)

3rd person , singular, active, optative (vidhi-liṅ) of śru

causative

causative root śrāv-

Root: śru (class 1)

Note: from causative stem śrāvaya-

श्राद्धे (śrāddhe) - at a Śrāddha ceremony (at a Śrāddha ceremony, in faith)

(noun)

Locative, neuter, singular of śrāddha

śrāddha - a ceremony in honor of deceased ancestors, faith, devotion

Note: Denotes the occasion.

ब्राह्मणान् (brāhmaṇān) - to Brahmins (Brahmins)

(noun)

Accusative, masculine, plural of brāhmaṇa

brāhmaṇa - a Brahmin, relating to Brahman

Note: Object of 'śrāvayet'.

पादम् (pādam) - a quarter (of the text) (a quarter, a foot, a part)

(noun)

Accusative, masculine, singular of pāda

pāda - foot, leg, quarter, ray of light, line of verse

Note: Object of 'śrāvayet'.

अन्ततः (antataḥ) - at least (lastly, at the end, at least)

(indeclinable)

Note: Specifies the minimum amount.

अक्षय्यम् (akṣayyam) - imperishable, yielding inexhaustible results (imperishable, inexhaustible)

(adjective)

Nominative, neuter, singular of akṣayya

akṣayya - imperishable, inexhaustible, unfading

Negation of kṣayya (perishable), from root kṣi (to perish)

Compound type : nañ-tatpuruṣa (a+kṣayya)

• a – not, un-
  indeclinable
• kṣayya – perishable, destructible
  adjective (neuter)
  future passive participle
  from root kṣi (to perish)
  Root: kṣi (class 5)

Note: Qualifies 'śrāddham'.

तस्य (tasya) - for him (of him, for him)

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

Note: Possessive, indicating benefit.

तत् (tat) - that (Śrāddha) (that, it)

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

Note: Demonstrative pronoun, refers back to 'śrāddham'.

श्राद्धम् (śrāddham) - Śrāddha offering/rite (Śrāddha ceremony, offering)

(noun)

Nominative, neuter, singular of śrāddha

śrāddha - a ceremony in honor of deceased ancestors, faith, devotion

Note: Subject of 'upatiṣṭhet'.

उपतिष्ठेत् (upatiṣṭhet) - becomes effective, reaches (the ancestors) (may stand by, may attend, may become effective, may reach)

(verb)

3rd person , singular, active, optative (vidhi-liṅ) of sthā

Prefix: upa

Root: sthā (class 1)

Note: Verb with prefix 'upa'.

पितॄन् (pitṝn) - ancestors (ancestors, fathers)

(noun)

Accusative, masculine, plural of pitṛ

pitṛ - father, ancestor

Note: Object of 'upatiṣṭhet' (reaches the ancestors).

अपि (api) - even (also, even, too)

(indeclinable)

Note: Emphasizes 'pitṝn'.