Śatapatha Brāhmaṇa ("of a hundred paths") 5.2.4.11

5.2.4.11

athendraturīyam | āgneyo 'ṣṭākapālaḥ puroḍāśo bhavati vāruṇo yavamayaścarū raudro gāvedhukaścaruranaḍuhyai vahalāyā aindraṃ dadhi tenendraturīyeṇa yajata indrāgnī u haivaitatsamūdāte utpibante vā imāni dikṣu nāṣṭrā rakṣāṃsi hantaibhyo vajram praharāveti

Thereupon the Indraturîya.--There is a cake on eight potsherds for Agni, a barley pap for Varuna, a pap of gavedhukâ seed (coix barbata) for Rudra; and a mess of sour curds from a yoke-trained cow for Indra: this Indraturîya he offers. Now Indra and Agni on that occasion consulted with each other: 'Verily the fiends, the Rakshas, suck out these (creatures) in the (four) quarters: come, let us throw the thunderbolt at them!'