Rishi: Ascribed in RV 9 to Pavāmāna seers (exact attribution for 9.83 not resolved from provided excerpt).
Devata: Soma Pavāmāna (with the cosmic ‘pavitra’ as operative symbol).
Chandas: Likely Triṣṭubh (verify against full hymn).
Samhita Patha (Devanagari)तपोष्पवित्रं विततं दिवस्पदे शोचन्तो अस्य तन्तवो व्यस्थिरन् । अवन्त्यस्य पवीतारमाशवो दिवस्पृष्ठमधि तिष्ठन्ति चेतसा ॥
Recitation with translationRig Veda 9.83.2
Transliterationtápoḥ pavitrám vítataṃ divás padé śócanto asya tántavo vy àsthirān | ávanty asya pavītā́ram āśávo divás pṛṣṭhám ádhi tiṣṭhanti cétasā ||
Translationतपोऽस्य पवित्रं दिवस्पदे विततम्; अस्य शोचन्तः तन्तवो व्यस्थिरन्। आशवोऽस्य पवीतारम् अवन्ति; चेतसा दिवस्पृष्ठम् अधि तिष्ठन्ति—उच्चं पदं धारयन्तः, यथा प्रवाहः शुद्धः स्फुटश्च भवेत्।
Word by Wordतपःheat, ardour, austerity पवित्रम्purifying filter, sieve विततम्stretched out, spread दिवःof heaven, of the sky पदेin the place/footing (station) अस्यof him/it (of this Soma/filter) विapart, forth (intensifier) अस्थिरन्they stood/settled (in place), were set अवन्तिthey aid, they further पवीतारम्the purifier/strainer (filtering agent) आशवःthe swift ones (swift streams/drops) पृष्ठम्back, ridge, surface तिष्ठन्तिthey stand, they remain चेतसाwith mind, by intention/awareness 
