Shatapatha Brahmana 5.5.1.1

5.5.1.1

āgneyo 'ṣṭākapālaḥ puroḍāśo bhavati | tam pūrvārdha āsādayatyaindra ekādaśakapālaḥ puroḍāśo bhavati saumyo vā carustaṃ dakṣiṇārdha āsādayati vaiśvadevaścarurbhavati tam paścārdha āsādayati maitrāvaruṇī payasyā bhavati tāmuttarārdha āsādayati bārhaspatyaścarurbhavati tam madhya āsādayatyeṣa caruḥ pañcabilastadyatpañca havīṃṣi bhavanti teṣām pañca bilāni tasmāccaruḥ pañcabilo nāma

There is a cake on eight potsherds for Agni: this he places on the eastern part (of the Vedi). There is either a cake on eleven potsherds for Indra, or a rice-pap for Soma: this he places on the southern part. There is a pap for the Visve Devâh (All-gods): this he places on the western part. There is a dish of curds for Mitra-Varuna: this he places on the north part. There is a pap for Brihaspati: this he places in the middle. This is the five-holed pap;--what five sacrificial dishes (havis) there are, for them there are five holes: hence the name 'five-holed pap.'