Rishi: Vājasaneyin ritual tradition (chandas-bandhu formula)
Devata: Agni; second hemistich invokes Chandas (Gāyatrī) as operative principle
Chandas: Gāyatrī (explicitly named; the mantra itself is a chandas-identification formula)
Samhita Patha (Devanagari)समि॑द्धो अ॒ग्निः स॒मिधा॒ सुस॑मिद्धो॒ वरे॑ण्यः । गा॒य॒त्री छन्द॑ इन्द्रि॒यं त्र्यविर्गौ॒र्वयो॑ दधुः
Transliterationsamídho agníḥ samídhā súsamiddho váreṇyaḥ | gāyatrī́ chánda indríyaṃ tryàvir gāúr váyo dadhúḥ
Translation薪によってアグニ(Agni)は点ぜられ、よく燃え、選び讃うべき者。ガーヤトリー(Gāyatrī)を韻律として――インドラの威力。三重の雌羊、雌牛、そして生命の息(プラーナ)――それらを彼らは据え定めた。
Padapatha (Word Analysis)समि॑द्धः । अ॒ग्निः । स॒मिधा॑ । सु-समि॑द्धः । वरे॑ण्यः । गा॒य॒त्री । छन्दः॑ । इ॒न्द्रि॒यम् । त्रि-अ॒विः । गौः । वयः॑ । द॒धुः
Word by Wordसमिधाwith fuel-stick / by kindling-fuel वरेण्यःmost choice-worthy / excellent गायत्रीGāyatrī (metre/deity) त्र्यविःthe threefold ewe (symbolic) दधुःthey placed / bestowed 
Entities MentionedI
Indra (as indriya/vigour) Viniyoga (Ritual Application)