Śatapatha Brāhmaṇa ("of a hundred paths") 3.7.4.11

3.7.4.11

rādhāṃsītsampṛñcānāvasampṛñcānau tanva iti | rādhāṃsyeva sampṛñcāthām nāpi tanūrityevaitadāha tau ha yattanūrapi sampṛñcīyātām prāgniryajamānaṃ dahetsa yadagnau juhoti tadeṣo 'gnaye prayacatyatha yāmevātrartvijo yajamānāyāśiṣamāśāsate tāmasmai sarvāmagniḥ samardhayati tadrādhāṃsyeva sampṛñcāte nāpi tanūstasmādāha rādhāṃsītsampṛñcānāvasampṛñcānau tanva iti

'Uniting blessings, not uniting bodies;' whereby he means to say, 'Unite ye your blessings only, but not also your bodies;' for were they also to unite their bodies, Agni (the fire) would burn the sacrificer. Now when this one sacrifices in the fire, he gives gifts to Agni; and whatever blessing the priests here invoke upon the sacrificer, all that Agni accomplishes. Thus they unite only their blessings, but not also their bodies: wherefore he says, 'Uniting blessings, not uniting bodies.'