Rishi: Ṛgvedic Aśvamedha tradition (sectional attribution).
Devata: Aśva (as consecrated victim), Vanaspati, Agni, and the Devas collectively.
Chandas: Jagatī/triṣṭubh mixture typical of cited Ṛgvedic material (approximate).
Samhita Patha (Devanagari)अश्वो॑ घृ॒तेन॒ त्मन्या॒ सम॑क्त॒ उप॑ दे॒वाँ२ ऋ॑तु॒शः पाथ॑ एतु । वन॒स्पति॑र्देवलो॒कं प्र॑जा॒नन्न॒ग्निना॑ ह॒व्या स्व॑दि॒तानि॑ वक्षत्
Transliterationáśvo ghṛténa tmanā́ sámakta úpa devā́m̐ r̥tuśáḥ pā́tha etu | vanáspátir devalokáṃ prajānán agnínā havyā́ svaditā́ni vakṣat |
Translationਘ੍ਰਿਤ ਨਾਲ ਆਪਣੀ ਹੀ ਸ਼ਕਤੀ ਦੁਆਰਾ ਅਭਿਸ਼ਿਕਤ ਅਸ਼ਵ ਤੁਸ਼ਃ (ਉਚਿਤ ਸਮੇਂ) ਮਾਰਗ ਰਾਹੀਂ ਦੇਵਾਂ ਕੋਲ ਜਾਵੇ। ਦੇਵਲੋਕ ਨੂੰ ਜਾਣਨ ਵਾਲਾ ਵਨਸਪਤੀ, ਅਗਨੀ ਨਾਲ, ਸੁਆਦਿਸ਼ਟ ਕੀਤੀਆਂ ਹਵ੍ਯਾਂ (ਆਹੁਤੀਆਂ) ਉਨ੍ਹਾਂ ਤੱਕ ਪਹੁੰਚਾਵੇ।
Padapatha (Word Analysis)अश्वः । घृ॒तेन । त्मन्या॒ । सम॑क्तः । उप । दे॒वान् । ऋ॒तु-शः । पाथः । एतु । वन॒स्पतिः । दे॒व-लोकम् । प्र॒जानन् । अ॒ग्निना॑ । ह॒व्या । स्व॑दि॒तानि । वक्षत्
Word by Wordत्मन्याwith (his) self / by his own power ऋतुशःseason by season, in due order वनस्पतिःthe lord of the forest (tree/wood) देवलोकम्the world/realm of the gods प्रजानन्knowing, recognizing अग्निनाwith Agni / by fire स्वदितानिmade sweet/pleasant, well-tasted वक्षत्let (him/it) carry/bring 
Entities MentionedA
Aśva (consecrated horse) Viniyoga (Ritual Application)