Ramayana
क्षीयमाणे तु लोके ऽस्मिन्सम्भ्रान्तमनसः सुराः । यदुक्तं विष्णुना पूर्वं तं यज्ञं समुपानयन् ॥ 7-86-6 ॥
As this world was wasting away, the gods, their minds bewildered, set about that sacrifice which had been spoken of beforehand by Vishnu.
english translation