योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-23, verse-24

रुद्रो भूत्वा भवत्येष महेन्द्रोऽथ पितामहः ।
शक्रो वैश्रवणश्चापि पुनरेव न किंचन ॥ २४ ॥

rudro bhūtvā bhavatyeṣa mahendro'tha pitāmahaḥ ,
śakro vaiśravaṇaścāpi punareva na kiṃcana 24

24. rudraḥ bhūtvā bhavati eṣaḥ mahendraḥ atha pitāmahaḥ
śakraḥ vaiśravaṇaḥ ca api punaḥ eva na kiṃcana

24. eṣaḥ rudraḥ bhūtvā atha mahendraḥ pitāmahaḥ ca api
śakraḥ vaiśravaṇaḥ bhavati punaḥ eva na kiṃcana

24. This (supreme being) manifests as Rudra, then as Mahendra (Indra), and then as Pitāmaha (Brahmā). He also becomes Śakra (Indra) and Vaiśravaṇa (Kubera), only to return to a state of nothingness (kiṃcana) once more.

Words meanings summery:

• रुद्रः (rudraḥ) - Rudra (a fierce deity, an aspect of Shiva)

• भूत्वा (bhūtvā) - having become, having been

• भवति (bhavati) - becomes, is, exists

• एषः (eṣaḥ) - this, this one, he

• महेन्द्रः (mahendraḥ) - Indra (Mahendra (a name for Indra), the great Indra)

• अथ (atha) - then, next, moreover, and

• पितामहः (pitāmahaḥ) - Brahmā (the creator deity) (grandfather; Brahmā (as the great ancestor))

• शक्रः (śakraḥ) - Indra (Śakra (a name for Indra, the powerful one))

• वैश्रवणः (vaiśravaṇaḥ) - Kubera (the god of wealth) (Vaiśravaṇa (a name for Kubera, son of Viśravas))

• च (ca) - and, also

• अपि (api) - also, even, too

• पुनः (punaḥ) - again, anew, back

• एव (eva) - indeed, just, only, certainly

• न (na) - not, no

• किंचन (kiṁcana) - nothing at all (anything, something (with na, means nothing))

Words meanings and morphology

रुद्रः (rudraḥ) - Rudra (a fierce deity, an aspect of Shiva)

(proper noun)

Nominative, masculine, singular of rudra

rudra - Rudra, Shiva, a fierce god

भूत्वा (bhūtvā) - having become, having been

(indeclinable)

absolutive

Derived from the root bhū, forming an indeclinable participle indicating a completed action.

Root: bhū (class 1)

भवति (bhavati) - becomes, is, exists

(verb)

3rd person , singular, active, present (laṭ) of bhū

Present Indicative

3rd person singular, present active indicative form of the root bhū.

Root: bhū (class 1)

एषः (eṣaḥ) - this, this one, he

(pronoun)

Nominative, masculine, singular of etad

etad - this, this one

महेन्द्रः (mahendraḥ) - Indra (Mahendra (a name for Indra), the great Indra)

(proper noun)

Nominative, masculine, singular of mahendra

mahendra - great Indra, king of gods

Compound type : tatpuruṣa (mahā+indra)

• mahā – great, large, mighty
  adjective
• indra – Indra, the king of gods
  proper noun (masculine)

अथ (atha) - then, next, moreover, and

(indeclinable)

पितामहः (pitāmahaḥ) - Brahmā (the creator deity) (grandfather; Brahmā (as the great ancestor))

(proper noun)

Nominative, masculine, singular of pitāmaha

pitāmaha - grandfather; Brahmā

शक्रः (śakraḥ) - Indra (Śakra (a name for Indra, the powerful one))

(proper noun)

Nominative, masculine, singular of śakra

śakra - powerful, strong; name of Indra

वैश्रवणः (vaiśravaṇaḥ) - Kubera (the god of wealth) (Vaiśravaṇa (a name for Kubera, son of Viśravas))

(proper noun)

Nominative, masculine, singular of vaiśravaṇa

vaiśravaṇa - son of Viśravas; Kubera, god of wealth

च (ca) - and, also

(indeclinable)

अपि (api) - also, even, too

(indeclinable)

पुनः (punaḥ) - again, anew, back

(indeclinable)

एव (eva) - indeed, just, only, certainly

(indeclinable)

न (na) - not, no

(indeclinable)

किंचन (kiṁcana) - nothing at all (anything, something (with na, means nothing))

(pronoun)

Nominative, neuter, singular of kiṃcana

kiṁcana - anything, something