Rig Veda 4.21.7

Sanskrit text [Accents, Plain, Transliterated]:

स॒त्रा यदीं॑ भार्व॒रस्य॒ वृष्ण॒: सिष॑क्ति॒ शुष्म॑: स्तुव॒ते भरा॑य । गुहा॒ यदी॑मौशि॒जस्य॒ गोहे॒ प्र यद्धि॒ये प्राय॑से॒ मदा॑य ॥
सत्रा यदीं भार्वरस्य वृष्णः सिषक्ति शुष्मः स्तुवते भराय । गुहा यदीमौशिजस्य गोहे प्र यद्धिये प्रायसे मदाय ॥
satrā yad īm bhārvarasya vṛṣṇaḥ siṣakti śuṣmaḥ stuvate bharāya | guhā yad īm auśijasya gohe pra yad dhiye prāyase madāya ||

English translation:

“True it is that this might of the son of the protector of the world, the showerer (of benefits), affects for his advantage the offerer of praise; it (prevails) in the secret (thoughts) of the worshipper, and in his dwelling, for (the accomplishment of his) pious acts, (the attainment of his) desires, and his delight.”

Commentary by Sāyaṇa: Ṛgveda-bhāṣya

The protector of the world: bhārvara = patronymic of Bhārvara, which means jagadbhartā, the protector of the world, or, Prajāpati; in the secret thoughts: the text has guhā pra; this is expanded into: guhārūpa hṛdaye prabhavati, the strength,balam, of Indra, prevails or presides over the heart, in the nature of secrecy or mystery; the purport of the entire verse is that the might of Indra always protects his worshipper, Indrasya balam sarvadā vajamānam pālayati

Details:

Ṛṣi (sage/seer): vāmadevo gautamaḥ [vāmadeva gautama];
Devatā (deity/subject-matter): indra:;
Chandas (meter): bhurikpaṅkti ;
Svara (tone/note): Swar;

Padapatha [Accents, Plain, Transliterated]:

स॒त्रा । यत् । इ॒म् । भा॒र्व॒रस्य॑ । वृष्णः॑ । सिस॑क्ति । शुष्मः॑ । स्तु॒व॒ते । भरा॑य । गुहा॑ । यत् । ई॒म् । औ॒शि॒जस्य॑ । गोहे॑ । प्र । यत् । धि॒ये । प्र । अय॑से । मदा॑य ॥
सत्रा । यत् । इम् । भार्वरस्य । वृष्णः । सिसक्ति । शुष्मः । स्तुवते । भराय । गुहा । यत् । ईम् । औशिजस्य । गोहे । प्र । यत् । धिये । प्र । अयसे । मदाय ॥
satrā | yat | im | bhārvarasya | vṛṣṇaḥ | sisakti | śuṣmaḥ | stuvate | bharāya | guhā | yat | īm | auśijasya | gohe | pra | yat | dhiye | pra | ayase | madāya

Multi-layer Annotation of the Ṛgveda

[Rigveda 4.21.7 English analysis of grammar]