Rigveda 9.16.4

प्र पु॑ना॒नस्य॒ चेत॑सा॒ सोम॑: प॒वित्रे॑ अर्षति ।क्रत्वा॑ स॒धस्थ॒मास॑दत्॥

pra punānasya cetasā soma: pavitre arṣati |kratvā sadhasthamāsadat ||

Our plain-language meaning of this verse is waiting for scholar review.