Rig Veda 1.164.15

Sanskrit text [Accents, Plain, Transliterated]:

सा॒कं॒जानां॑ स॒प्तथ॑माहुरेक॒जं षळिद्य॒मा ऋष॑यो देव॒जा इति॑ । तेषा॑मि॒ष्टानि॒ विहि॑तानि धाम॒शः स्था॒त्रे रे॑जन्ते॒ विकृ॑तानि रूप॒शः ॥
साकंजानां सप्तथमाहुरेकजं षळिद्यमा ऋषयो देवजा इति । तेषामिष्टानि विहितानि धामशः स्थात्रे रेजन्ते विकृतानि रूपशः ॥
sākaṃjānāṃ saptatham āhur ekajaṃ ṣaḻ id yamā ṛṣayo devajā iti | teṣām iṣṭāni vihitāni dhāmaśaḥ sthātre rejante vikṛtāni rūpaśaḥ ||

English translation:

“Of those that are born together, sages have called the seventh single-born; for six are twins, and are moveable, and born of the gods; their desirable (properties), plural ced severally in their proper abode, are various (also) in form, and revolve for (the benefit of) that which is stationary.”

Commentary by Sāyaṇa: Ṛgveda-bhāṣya

Six are twins: six seasons, made of two months each; the seventh is the intercalary month, which has no āditya to preside over it; the six seasons are also ṛsi, ṛṣayaḥ = gantāraḥ, goers; a ṛṣi is present in the sun's car in each of the twelve months; revolve for the benefit: the seasons are diversified by classes of temperature, produce, for the benefit of the world

Details:

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

Padapatha [Accents, Plain, Transliterated]:

सा॒क॒म्ऽजाना॑म् । स॒प्तथ॑म् । आ॒हुः॒ । ए॒क॒ऽजम् । षट् । इत् । य॒माः । ऋष॑यः । दे॒व॒ऽजाः । इति॑ । तेषा॑म् । इ॒ष्टानि॑ । विऽहि॑तानि । धा॒म॒ऽशः स्था॒त्रे । रे॒ज॒न्ते॒ । विऽकृ॑तानि । रू॒प॒ऽशः ॥
साकम्जानाम् । सप्तथम् । आहुः । एकजम् । षट् । इत् । यमाः । ऋषयः । देवजाः । इति । तेषाम् । इष्टानि । विहितानि । धामशः स्थात्रे । रेजन्ते । विकृतानि । रूपशः ॥
sākam-jānām | saptatham | āhuḥ | eka-jam | ṣaṭ | it | yamāḥ | ṛṣayaḥ | deva-jāḥ | iti | teṣām | iṣṭāni | vi-hitāni | dhāma-śaḥ sthātre | rejante | vi-kṛtāni | rūpa-śaḥ

Multi-layer Annotation of the Ṛgveda

[Rigveda 1.164.15 English analysis of grammar]