महाभारतः mahābhārataḥ - book-3, chapter-180, verse-45

तमप्यथ महात्मानं सर्वे तु पुरुषर्षभाः ।
पाद्यार्घ्याभ्यां यथान्यायमुपतस्थुर्मनीषिणम् ॥४५॥

45. tamapyatha mahātmānaṁ sarve tu puruṣarṣabhāḥ ,
pādyārghyābhyāṁ yathānyāyamupatasthurmanīṣiṇam.

45. tam api atha mahātmānam sarve tu puruṣarṣabhāḥ
pādyārghyābhyām yathānyāyam upatasthuḥ manīṣiṇam

45. Then, all those leading men (puruṣarṣabha) honored that great-souled (mahā-ātman) and wise one properly, with water for the feet and a respectful offering.

Words meanings summery:

• तम् (tam) - Refers to Nārada. (him, that)

• अपि (api) - also, even

• अथ (atha) - then, next

• महात्मानम् (mahātmānam) - Describes Nārada as a person with a great spirit (ātman). (the great-souled one, the noble one)

• सर्वे (sarve) - Refers to all the assembled Pāṇḍavas and other important persons. (all, everyone)

• तु (tu) - but, indeed, and

• पुरुषर्षभाः (puruṣarṣabhāḥ) - An epithet for the Pāṇḍavas, meaning 'bulls among men', denoting excellence. (best among men, leading men)

• पाद्यार्घ्याभ्याम् (pādyārghyābhyām) - Refers to the traditional ritual items offered to an honored guest. (with water for the feet and a respectful offering)

• यथान्यायम् (yathānyāyam) - Indicates adherence to established customs and proper etiquette (dharma). (according to justice, properly, as is right)

• उपतस्थुः (upatasthuḥ) - They paid homage and attended to Nārada. (they stood by, served, honored, approached)

• मनीषिणम् (manīṣiṇam) - Describes Nārada as a sagacious person. (the wise one, the intelligent one, the sage)

Words meanings and morphology

तम् (tam) - Refers to Nārada. (him, that)

(pronoun)

Accusative, masculine, singular of tad

tad - that, he, she, it

Note: Object of the verb 'upatasthuḥ'.

अपि (api) - also, even

(indeclinable)

अथ (atha) - then, next

(indeclinable)

महात्मानम् (mahātmānam) - Describes Nārada as a person with a great spirit (ātman). (the great-souled one, the noble one)

(adjective)

Accusative, masculine, singular of mahā-ātman

mahā-ātman - great-souled, noble, magnanimous, a great being

सर्वे (sarve) - Refers to all the assembled Pāṇḍavas and other important persons. (all, everyone)

(pronoun)

Nominative, masculine, plural of sarva

sarva - all, every, whole, complete

Note: Subject of 'upatasthuḥ'.

तु (tu) - but, indeed, and

(indeclinable)

पुरुषर्षभाः (puruṣarṣabhāḥ) - An epithet for the Pāṇḍavas, meaning 'bulls among men', denoting excellence. (best among men, leading men)

(noun)

Nominative, masculine, plural of puruṣarṣabha

puruṣarṣabha - best of men, foremost among men, excellent man (literally 'bull of men')

Note: Subject of the verb 'upatasthuḥ'.

पाद्यार्घ्याभ्याम् (pādyārghyābhyām) - Refers to the traditional ritual items offered to an honored guest. (with water for the feet and a respectful offering)

(noun)

Instrumental, neuter, dual of pādya-arghya

pādya-arghya - water for feet and respectful offering (a pair of ritual items)

Compound type : dvandva (pādya+arghya)

• pādya – water for washing feet, something fit for the feet
  noun (neuter)
  Gerundive
  From pāda (foot) + -ya suffix, or from √pā (to drink) in the sense of 'water fit for offering'.
• arghya – respectful offering, water to be offered to an honorable guest
  noun (neuter)
  Gerundive
  From argha (value, honor) + -ya suffix, meaning 'that which is offered as honor'.

यथान्यायम् (yathānyāyam) - Indicates adherence to established customs and proper etiquette (dharma). (according to justice, properly, as is right)

(indeclinable)

उपतस्थुः (upatasthuḥ) - They paid homage and attended to Nārada. (they stood by, served, honored, approached)

(verb)

3rd person , plural, active, perfect (liṭ) of upatasthā

Perfect tense (Liṭ)

From upa + √sthā (to stand). Third person plural perfect tense, active voice, reduplicated form.

Prefix: upa

Root: √sthā (class 1)

मनीषिणम् (manīṣiṇam) - Describes Nārada as a sagacious person. (the wise one, the intelligent one, the sage)

(noun)

Accusative, masculine, singular of manīṣin

manīṣin - wise, intelligent, thoughtful, a sage, a man of intellect

From manīṣā (intellect, wisdom) + -in suffix.

Note: Object of the verb 'upatasthuḥ'.