Śatapatha Brāhmaṇa ("of a hundred paths") 4.5.2.6

4.5.2.6

tadāhuḥ | kathametaṃ garbhaṃ kuryādityaṅgādaṅgāddhaivāsyāvadyeyuryathaivetareṣāmavadānānāmavadānaṃ tadu tathā na kuryāduta hyeṣo 'vikṛtāṅgo bhavatyadhastādeva grīvā apikṛtyaitasyāṃ sthālyāmetam medhaṃ ścotayeyuḥ sarvebhyo vā asyaiṣo 'ṅgebhyo medha ścotati tadasya sarveṣāmevāṅgānāmavattam bhavatyavadyanti vaśāyā avadānāni yathaiva teṣāmavadānam

Here now they say, 'What is he to do with that embryo?'--They might cut off a portion from every limb, even as (is done) the portioning of other portions. But let him not do so; for that (embryo) surely has its limbs undeveloped. Having cut it below the neck, they should let that fat juice drip into the pot; for that same juice drips from all its limbs, and thus it is a portion cut out from all its limbs. He then cuts the sacrificial portions of the cow in the same way in which they are (usually) portioned off.