Śatapatha Brāhmaṇa ("of a hundred paths") 9.2.3.4

9.2.3.4

tadvā etatkriyate | yaddevā akurvannidaṃ nu tāni rakṣāṃsi devairevāpahatāni yattvetatkaroti yaddevā akurvaṃstatkaravāṇītyatho indreṇa caivaitadbṛhaspatinā ca dakṣiṇato surānrakṣāṃsi nāṣṭrā apahatyābhaye 'nāṣṭra etaṃ yajñaṃ tanute

Now what the gods did then, that is done on this occasion. Those fiends, it is true, have now been chased away by the gods themselves, but when he does this, he does so thinking, 'I will do what the gods did;' and having had the Asuras, the mischievous fiends, chased away in the south by Indra and Brihaspati, he performs this sacrifice in a place free from danger and devilry.