Rishi: unknown
Devata: likely Indra (continuity with surrounding Indra hymns; explicit ‘deva’ here)
Chandas: likely Triṣṭubh (not verified from input alone)
Samhita Patha (Devanagari)मन्द्रस्य कवेर्दिव्यस्य वह्नेर्विप्रमन्मनो वचनस्य मध्वः । अपा नस्तस्य सचनस्य देवेषो युवस्व गृणते गोअग्राः ॥
Recitation with translationRig Veda 6.39.1
Transliterationmandrásya kavér divyásya váhner viprámanmano vacanásya mádhvaḥ | apā́ naḥ tásya sacanásya deva íṣo yuvasva gṛṇaté go-agrāḥ ||
Translationহে দেব, সেই মন্দ্ৰ (সুৰেলা) কবিৰ—দিব্য বহ্নি/বাহকৰ—প্ৰভাময় মনৰে পূৰ্ণ, মধুৰ বাক্যৰ প্ৰেৰণা আমাৰ বাবে পোষণ কৰা। স্তৱ গোৱা গায়কৰ বাবে, সেই সঙ্গতিৰ শক্তিসমূহ বৃদ্ধি কৰা—আলোক-ৰশ্মিসমূহ আগত ৰাখি।
Word by Wordमन्द्रस्यof the gladdening/pleasant (one) वह्नेःof the bearer/conveyor (Agni) विप्रमन्मनःof him whose thought is that of a seer (inspired-minded) वचनस्यof the utterance/word मध्वःof sweetness / of honey (i.e., sweet speech) अपaway, forth (as preverb) सचनस्यof companionship/association; of the fellowship देवेषःthe god-seeker / one who seeks the gods (worshipper) युवस्वjoin yourself; yoke (yourself) गृणते(he) praises / to the one who praises (contextual) गोअग्राःhaving cows in front; cow-leading (bringing cattle first) 
