Rishi: Vājasaneyin ritual tradition (school attribution).
Devata: Apāmārga (as a deified plant-power) and the general expiatory force of ‘apa’ (removal).
Chandas: Anuṣṭubh-like (to be verified); compact expiatory verse.
Samhita Patha (Devanagari) अपा॒घमप॒ किल्वि॑ष॒मप॑ कृ॒त्यामपो॒ रप॑: । अपा॑मार्ग॒ त्वम॒स्मदप॑ दु॒:ष्वप्न्य॑ᳪ सुव
Transliteration apā́gham ápa kílviṣam ápa kṛtyā́m ápo rápāḥ | apā́mārga tvám asmád ápa duḥsvápnyaṃ suva
Translation অপাঘ (অপামার্গ) দূরে করুক—অশুভকে, পাপকে, কিল্বিষকে, কৃত্যা (অভিচার)কে, এবং রপঃ (কলুষ/দূষণ)কে। হে অপামার্গ! আমাদের থেকে দুঃস্বপ্ন (অশুভ স্বপ্ন)ও দূর করে দাও।
Padapatha (Word Analysis) अप । अघम् । अप । किल्विषम् । अप । कृत्याम् । अप । रपः । अपामार्ग । त्वम् । अस्मत् । अप । दुः-स्वप्न्यम् । सुव
Word by Word अपाघम् (remove) the blemish/evil कृत्याम् witchcraft, harmful rite अपामार्ग O Apāmārga (the plant/personified remover) दुःस्वप्न्यम् bad dream, nightmare (evil of bad dreaming) सुव impel/drive (it) away; set (it) forth Entities Mentioned A
Apa (apah—‘removal’ as an apotropaic force) Viniyoga (Ritual Application)