Rishi: Dīrghatamas Āucathya (attribution commonly given for RV 1.142 in Anukramaṇī tradition)
Devata: Tanūnapāt (Agni as the inborn fire); verse functions as an invocation within the sacrificial sequence
Chandas: Triṣṭubh (11-syllable cadence typical for invocatory and ritual-progress verses)
Samhita Patha (Devanagari)घृतवन्तमुप मासि मधुमन्तं तनूनपात् । यज्ञं विप्रस्य मावतः शशमानस्य दाशुषः ॥
Transliterationghṛtávantam úpa māsi mádhumantaṃ tanū-napāt | yajñáṃ víprasya mā́vataḥ śaśamā́nasyá dā́śuṣaḥ ||
Translationيا تَنُونَپات، اقتربْ من هذه القُربان الغنيّة بالسمن المصفّى (غِرتا) والممتلئة بالعسل/الحلاوة (مَدْهو). ثبّتْ وارفعْ يَجْنَ الحكيم المُلهَم—ذلك المُعطي الذي يسكن في ضبطِ النفس—ليغدو العطاءُ قوّةً راسخةً فينا.
Word by Wordघृतवन्तम्buttery, ghee-bearing मासिmeasure out / mete out (imperative) मधुमन्तम्honeyed, sweet, rich in mead तनूनपात्O Tanūnapāt (Agni as ‘offspring of himself/embodied’) विप्रस्यof the inspired poet/priest मावतःof the bountiful/possessing abundance (lit. ‘having measure’) शशमानस्यof the praising one / of him who is chanting दाशुषःof the giver, worshipper (the one who offers) 
