Śatapatha Brāhmaṇa ("of a hundred paths") 3.8.3.36

3.8.3.36

atha paśuṃ sammṛśati | etarhi sammarśanasya kālo 'tha yatpurā samṛśati ya ima upatiṣṭhante te vimathiṣyanta iti śaṅkamāno yadyu vimāthānna śaṅketātraiva sammṛśet

Thereupon he touches (what remains of) the victim: now is the time for the touching. And whether he has touched it before, fearing 'those (evil spirits) that hover near will tear it about,' or whether he be not afraid of its being torn about, let him in any case now touch (the victim).