Rigveda 10.16.6

यत्ते॑ कृ॒ष्णः श॑कु॒न आ॑तु॒तोद॑ पिपी॒लः स॒र्प उ॒त वा॒ श्वाप॑दः ।अ॒ग्निष्टद्वि॒श्वाद॑ग॒दं कृ॑णोतु॒ सोम॑श्च॒ यो ब्रा॑ह्म॒णाँ आ॑वि॒वेश॑॥

yatte kṛṣṇaḥ śakuna ātutoda pipīlaḥ sarpa uta vā śvāpadaḥ |agniṣṭadviśvādagadaṃ kṛṇotu somaśca yo brāhmaṇām̐ āviveśa ||

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