Gobhilagrihyasutra 2.9.6

2.9.6

vrīhiyavais tilamāṣair iti pṛthak pātrāṇi pūrayitvā purastād upanidadhyuḥ.

Let them fill vessels separately with rice and barley, with sesamum seeds and beans, and let them place (those vessels) to the east (of the fire).