Shatapatha Brahmana 9.2.3.2

9.2.3.2

etadvai devānupapraiṣyataḥ | etaṃ yajñaṃ taṃsyamānāndakṣiṇato 'surā rakṣāṃsi nāṣṭrā ajighāṃsanna yakṣyadhve na yajñaṃ taṃsyadhva iti

For at that time, as the gods were about to come up in order to perform this sacrifice, the Asuras, the mischievous fiends, tried to smite them from the south, saying, 'Ye shall not sacrifice! ye shall not perform the sacrifice!'