Rishi: Traditionally associated with the Śukla-Yajurvedic Adhvaryu lineage (often transmitted under Yājñavalkya’s school authority rather than a single ṛṣi attribution for such operational formulas)
Devata: Agni (as Vratapati)
Chandas: Yajus (prose formula; not a fixed metrical chandas)
ágnē vratapatē vratám acāriṣaṃ tád aśakaṃ tán mē ’rādhī́d amáhaṃ yá ēvā́smí só ’smí
Translation
Ô Agni, seigneur du vœu, j’ai observé le vœu ; cela, j’ai pu l’accomplir. Que cela me soit rendu efficace : je suis cela — en vérité, ce que je suis, je le suis.