Rig Veda 1.159.4

Sanskrit text [Accents, Plain, Transliterated]:

ते मा॒यिनो॑ ममिरे सु॒प्रचे॑तसो जा॒मी सयो॑नी मिथु॒ना समो॑कसा । नव्यं॑नव्यं॒ तन्तु॒मा त॑न्वते दि॒वि स॑मु॒द्रे अ॒न्तः क॒वय॑: सुदी॒तय॑: ॥
ते मायिनो ममिरे सुप्रचेतसो जामी सयोनी मिथुना समोकसा । नव्यंनव्यं तन्तुमा तन्वते दिवि समुद्रे अन्तः कवयः सुदीतयः ॥
te māyino mamire supracetaso jāmī sayonī mithunā samokasā | navyaṃ-navyaṃ tantum ā tanvate divi samudre antaḥ kavayaḥ sudītayaḥ ||

English translation:

“Those provident and intelligent sisters, (the rays of light), conceived of the same womb, (ever) united (with each other), and dwelling in the same abode, metre out (all things); knowing (their functions), and bright-shining, they spread in ever new (directions) throughout the radiant firmament.”

Commentary by Sāyaṇa: Ṛgveda-bhāṣya

The epithets are to agree with te, they two;but some epithers are in plural ra, not the dual: te māyinaḥ supracetasaḥ, kavayaḥ sudītyaḥ; some are in the dual: sayoni, samokasā; the plural rals seem to imply another substantive: raśmayaḥ, rays of light: e.g., supracetasaḥ = prakarṣeṇa cetitum śaktā raśmayaḥ, rays able distinctly to apprehend; sudītayaḥ udyotanāḥ, raśmayaḥ, rising rays; the dual s are consistently referred to 'heaven and earth': samokasā, both dwelling together in the same space: dyu pṛthivyor ekasmin nevā vakāśarūpe ākāśe avasthānāt

Details:

Ṛṣi (sage/seer): dīrghatamā aucathyaḥ [dīrghatamas aucathya];
Devatā (deity/subject-matter): dyāvāpṛthivyau ;
Chandas (meter): jagatī ;
Svara (tone/note): Swar;

Padapatha [Accents, Plain, Transliterated]:

ते । मा॒यिनः॑ । म॒मि॒रे॒ । सु॒ऽप्रचे॑तसः । जा॒मी इति॑ । सयो॑नी॒ इति॒ सऽयो॑नी । मि॒थु॒ना । सम्ऽओ॑कसा । नव्य॑म्ऽनव्यम् । तन्तु॑म् । आ । त॒न्व॒ते । दि॒वि । स॒मु॒द्रे । अ॒न्तरिति॑ । क॒वयः॑ । सु॒ऽदी॒तयः॑ ॥
ते । मायिनः । ममिरे । सुप्रचेतसः । जामी इति । सयोनी इति सयोनी । मिथुना । सम्ओकसा । नव्यम्नव्यम् । तन्तुम् । आ । तन्वते । दिवि । समुद्रे । अन्तरिति । कवयः । सुदीतयः ॥
te | māyinaḥ | mamire | su-pracetasaḥ | jāmī iti | sayonī itisa-yonī | mithunā | sam-okasā | navyam-navyam | tantum | ā | tanvate | divi | samudre | antariti | kavayaḥ | su-dītayaḥ

Multi-layer Annotation of the Ṛgveda

[Rigveda 1.159.4 English analysis of grammar]