Shatapatha Brahmana 6.6.1.10

6.6.1.10

eka eṣa bhavati | ekamiva hi śiraścaruritaro bahudevatyo bhūmā vā eṣa taṇḍulānāṃ yaccarurbhūmo eṣo 'ṅgānāṃ yadātmātmaṃstadaṅgānām bhūmānaṃ dadhāti

That (Vaisvânara cake) is one single (oblation), for the head is, as it were, one only; and the other, the pap, has many deities, for that pap is a multiplicity of rice-grains, and this body is a multiplicity of limbs: he thus bestows on the body a multiplicity of limbs.