Śatapatha Brāhmaṇa ("of a hundred paths") 9.5.1.26

9.5.1.26

teṣu pretaṣu | savanīyena paśunācaraṃstadu hāsurā anveva bubudhire tasyaitāvatkṛtamāsa yāvadetasya paśoḥ kriyate 'thājagmuste devā asurānpra

When they had gone, (the gods) went on with the animal-offering of the Soma-sacrifice. But the Asuras became aware of this also. As much of this animal-offering as is done (at the evening-service) had been done, when they arrived. The gods, espying them, snatched up the sacrifice, and began doing something else. They went away, thinking, 'It is something else they are doing.'