Śatapatha Brāhmaṇa ("of a hundred paths") 9.3.4.4

9.3.4.4

sarvauṣadham bhavati | sarvametadannaṃ yatsarvauṣadhaṃ sarveṇaivainametadannena prīṇātyatho sarveṇaivainametadannenābhiṣiñcati teṣāmekamannamuddharettasya nāśnīyādyāvajjīvamaudumbareṇa camasenaudumbareṇa sruveṇa tayorukto bandhuścatuḥsrakto bhavataścatasro vai diśaḥ sarvābhya evainametaddigbhyo 'nnena prīṇātyatho sarvābhya evainametaddigbhyo 'nnenābhiṣiñcati

It consists of (seeds of) all (kinds of) plants,--that which consists of all plants is all food: he thus gratifies him with all food, and with all food he thus consecrates him. Let him set aside one of these kinds of food, and not eat thereof as long as he lives. With an udumbara (ficus glomerata) cup and an udumbara dipping-spoon (he offers): the significance of these two has been explained. They are both four-cornered,--there are four quarters: he thus gratifies him with food from every quarter, and by means of food from every quarter he thus consecrates him.