Śatapatha Brāhmaṇa ("of a hundred paths") 3.2.3.7

3.2.3.7

sa yadādityaṃ carum prāyaṇīyaṃ nirvapati | yajñasyaiva dṛṣṭyai yajñaṃ dṛṣṭvā krīṇāni taṃ tanavā iti tasmādādityaṃ carum prāyaṇīyaṃ nirvapati tadvai niruptaṃ havirāsīdaniṣṭā devatā

Hence, when he prepares the Prâyanîya rice-pap for Aditi, he does so for the purpose of his seeing the sacrifice: 'After seeing the sacrifice I shall buy (the Soma) and spread that (sacrifice);' thus thinking he prepares the Prâyanîya pap for Aditi. The sacrificial food had been prepared, but offering had not yet been made to the deity (Aditi),--