Rishi: Puruṣa-sūkta tradition (later Vedic attribution; often treated as śruti without single human seer in Brāhmaṇa-style exegesis)
Devata: Puruṣa / Prajāpati (yajña as cosmic person)
Chandas: Triṣṭubh (Puruṣa-sūkta complex; verse-level metrical analysis may vary by pada-count tradition)
Samhita Patha (Devanagari) तस्मा॑द्य॒ज्ञात् स॑र्व॒हुत॒ ऋच॒: सामा॑नि जज्ञिरे । छन्दा॑ᳪसि जज्ञिरे॒ तस्मा॒द्यजु॒स्तस्मा॑दजायत
Transliteration tásmād yajñā́t sarvahúta ṛ́caḥ sā́māni jajñire | chándāṃsi jajñire tásmād yájus tásmād ajāyata
Translation From that Sacrifice, the All-offering, were born the Ṛc-verses and the Sāman-chants; from it were born the metres; from it the Yajus was brought forth.
Padapatha (Word Analysis) तस्मात् । यज्ञात् । सर्व-हुतः । ऋचः । सामानि । जज्ञिरे । छन्दांसि । जज्ञिरे । तस्मात् । यजुः । तस्मात् । अजायत
Word by Word यज्ञात् from the sacrifice सर्वहुतः the all-offering (sacrifice) यजुः the Yajus (sacrificial formula) Viniyoga (Ritual Application)