योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-89, verse-58

सबाह्याभ्यन्तरे शान्ते स्पन्दे तत्त्वविदां वर ।
धातवः संस्थितिं देहे न त्यजन्ति कदाचन ॥ ५८ ॥

sabāhyābhyantare śānte spande tattvavidāṃ vara ,
dhātavaḥ saṃsthitiṃ dehe na tyajanti kadācana 58

58. sabāhyābhyantare śānte spande tattvavidām vara
dhātavaḥ saṃsthitim dehe na tyajanti kadācana

58. tattvavidām vara,
sabāhyābhyantare spande śānte,
dhātavaḥ dehe saṃsthitim kadācana na tyajanti

58. O best among the knowers of reality (tattva), when the pulsation (spanda), both external and internal, is completely calmed, the bodily constituents (dhātu) never abandon their stable state within the body.

Words meanings summery:

• सबाह्याभ्यन्तरे (sabāhyābhyantare) - in the external and internal pulsation (in the external and internal, in that which is both external and internal)

• शान्ते (śānte) - when the pulsation is calmed (in the calmed, in the peaceful)

• स्पन्दे (spande) - in the pulsation, in the vibration

• तत्त्वविदाम् (tattvavidām) - of the knowers of truth, of the knowers of reality

• वर (vara) - O excellent one (best, excellent one, boon)

• धातवः (dhātavaḥ) - the bodily constituents, the elements

• संस्थितिम् (saṁsthitim) - stable state, proper state, stability, fixed position

• देहे (dehe) - in the body

• न (na) - not, no

• त्यजन्ति (tyajanti) - they abandon, they leave, they quit

• कदाचन (kadācana) - never (ever, at any time (with a negative: never))

Words meanings and morphology

सबाह्याभ्यन्तरे (sabāhyābhyantare) - in the external and internal pulsation (in the external and internal, in that which is both external and internal)

(adjective)

Locative, masculine, singular of sabāhyābhyantara

sabāhyābhyantara - with external and internal, both external and internal

Compound type : bahuvrīhi (sa+bāhya+ābhyantara)

• sa – with, together with
  indeclinable
• bāhya – external, outer
  adjective (masculine)
• ābhyantara – internal, inner
  adjective (masculine)

शान्ते (śānte) - when the pulsation is calmed (in the calmed, in the peaceful)

(adjective)

Locative, masculine, singular of śānta

śānta - calmed, tranquil, peaceful, quieted

Past Passive Participle

Derived from root śam

Root: śam (class 4)

स्पन्दे (spande) - in the pulsation, in the vibration

(noun)

Locative, masculine, singular of spanda

spanda - vibration, pulsation, tremor, movement

Root: spad (class 1)

तत्त्वविदाम् (tattvavidām) - of the knowers of truth, of the knowers of reality

(noun)

Genitive, masculine, plural of tattvavid

tattvavid - knower of truth, knower of reality

Compound type : tatpuruṣa (tattva+vid)

• tattva – truth, reality, principle, essence
  noun (neuter)
• vid – knower, understanding
  noun (masculine)
  Root: vid (class 2)

वर (vara) - O excellent one (best, excellent one, boon)

(adjective)

Vocative, masculine, singular of vara

vara - best, excellent, superior; boon, blessing

Root: vṛ (class 9)

धातवः (dhātavaḥ) - the bodily constituents, the elements

(noun)

Nominative, masculine, plural of dhātu

dhātu - element, constituent, bodily humor, root (of a word), mineral

Root: dhā (class 3)

संस्थितिम् (saṁsthitim) - stable state, proper state, stability, fixed position

(noun)

Accusative, feminine, singular of saṃsthiti

saṁsthiti - proper state, stability, fixed position, existing together

Prefix: sam

Root: sthā (class 1)

देहे (dehe) - in the body

(noun)

Locative, masculine, singular of deha

deha - body, form, mass

Root: dih (class 4)

न (na) - not, no

(indeclinable)

त्यजन्ति (tyajanti) - they abandon, they leave, they quit

(verb)

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

Root: tyaj (class 1)

कदाचन (kadācana) - never (ever, at any time (with a negative: never))

(indeclinable)