महाभारतः mahābhārataḥ - book-1, chapter-69, verse-13

सुखं जीवन्त्यदोषज्ञा मूर्खा दोषानुदर्शिनः ।
यत्र वाच्याः परैः सन्तः परानाहुस्तथाविधान् ॥१३॥

13. sukhaṁ jīvantyadoṣajñā mūrkhā doṣānudarśinaḥ ,
yatra vācyāḥ paraiḥ santaḥ parānāhustathāvidhān.

13. sukham jīvanti adoṣajñāḥ mūrkāḥ doṣānudarśinaḥ
yatra vācyāḥ paraiḥ santaḥ parān āhuḥ tathāvidhān

13. Those who are unaware of others' faults live happily, while fools are always fault-finders. If the virtuous are criticized by others (the fools), they (the virtuous) in turn declare those others to be deserving of such criticism.

Words meanings summery:

• सुखम् (sukham) - happily (happily, comfortably, easily)

• जीवन्ति (jīvanti) - live (happily) (they live, they exist)

• अदोषज्ञाः (adoṣajñāḥ) - those who are unaware of others' faults (those who do not know faults, ignorant of defects)

• मूर्काः (mūrkāḥ) - fools (fools, ignorant people)

• दोषानुदर्शिनः (doṣānudarśinaḥ) - (are) fault-finders (fault-finders, those who see faults)

• यत्र (yatra) - if, in a situation where (where, in which, in which case)

• वाच्याः (vācyāḥ) - to be criticized, censurable (to be spoken, to be said, to be censured, blamable)

• परैः (paraiḥ) - by others (i.e., the fools) (by others)

• सन्तः (santaḥ) - good people, virtuous people

• परान् (parān) - those others (who were criticizing) (others, enemies)

• आहुः (āhuḥ) - they (the virtuous) declare (they say, they tell)

• तथाविधान् (tathāvidhān) - deserving of such (criticism) (of such a kind, like that, such)

Words meanings and morphology

सुखम् (sukham) - happily (happily, comfortably, easily)

(indeclinable)

Accusative singular of sukha (neuter) used adverbially.

Note: Adverb modifying jīvanti.

जीवन्ति (jīvanti) - live (happily) (they live, they exist)

(verb)

3rd person , plural, active, present (laṭ) of jīv

present tense

Derived from root √jīv (class 1, jīvati, to live).

Root: jīv (class 1)

अदोषज्ञाः (adoṣajñāḥ) - those who are unaware of others' faults (those who do not know faults, ignorant of defects)

(noun)

Nominative, masculine, plural of adoṣajña

adoṣajña - not knowing faults, ignorant of defects

Compound type : bahuvrīhi (a+doṣa+jña)

• a – not, un-
  indeclinable
• doṣa – fault, defect, vice, blame
  noun (masculine)
  Root: duṣ (class 4)
• jña – knower, understanding
  adjective
  Derived from root √jñā (to know).
  Root: jñā (class 9)

Note: Subject of jīvanti.

मूर्काः (mūrkāḥ) - fools (fools, ignorant people)

(noun)

Nominative, masculine, plural of mūrkha

mūrkha - a fool, ignorant, stupid

Note: Subject of an implied verb or predicate.

दोषानुदर्शिनः (doṣānudarśinaḥ) - (are) fault-finders (fault-finders, those who see faults)

(adjective)

Nominative, masculine, plural of doṣānudarśin

doṣānudarśin - seeing faults, finding fault, censorious

From doṣa (fault) + anu (after, following) + √dṛś (to see) with ini suffix.

Compound type : tatpurusha (doṣa+anudarśin)

• doṣa – fault, defect, vice, blame
  noun (masculine)
  Root: duṣ (class 4)
• anudarśin – seeing after, observing, looking to
  adjective (masculine)
  agent noun/adjective
  Derived from prefix 'anu' + root 'dṛś' (to see) with suffix 'ini' (agent).
  Prefix: anu
  Root: dṛś (class 1)

Note: Predicate adjective for mūrkāḥ.

यत्र (yatra) - if, in a situation where (where, in which, in which case)

(indeclinable)

वाच्याः (vācyāḥ) - to be criticized, censurable (to be spoken, to be said, to be censured, blamable)

(adjective)

Nominative, masculine, plural of vācya

vācya - to be spoken, to be said, to be censured, blamable, fit to be addressed

gerundive (future passive participle)

Derived from root √vac (to speak) with suffix ṇyat.

Root: vac (class 2)

परैः (paraiḥ) - by others (i.e., the fools) (by others)

(pronoun)

Instrumental, masculine, plural of para

para - other, another, different, superior, subsequent; an enemy, another person

सन्तः (santaḥ) - good people, virtuous people

(noun)

Nominative, masculine, plural of sant

sant - being, existing, good, virtuous; a good person, saint

present active participle

Derived from root √as (to be). Used as a noun.

Root: as (class 2)

परान् (parān) - those others (who were criticizing) (others, enemies)

(pronoun)

Accusative, masculine, plural of para

para - other, another, different, superior, subsequent; an enemy, another person

Note: Refers to the 'others' who are doing the censuring.

आहुः (āhuḥ) - they (the virtuous) declare (they say, they tell)

(verb)

3rd person , plural, active, perfect (lit) of vac

perfect tense (irregular)

Irregular perfect 3rd plural of √vac (class 2, vakti). Often taken in present sense here.

Root: vac (class 2)

तथाविधान् (tathāvidhān) - deserving of such (criticism) (of such a kind, like that, such)

(adjective)

Accusative, masculine, plural of tathāvidha

tathāvidha - of such a kind, such, similar, of like nature

Compound of tathā (thus) + vidha (kind, sort).

Compound type : karmadhāraya (tathā+vidha)

• tathā – so, thus, in that manner
  indeclinable
• vidha – kind, sort, manner
  noun (masculine)