 तस्य पर्वणि तं यज्ञं यजमानस्य वासव:।राक्षसीं तनुमास्थाय यज्ञीयाश्वमपाहरत्।। 
 On the concluding day of the fortnight full moon day while the sacrifice was being performed, Vasava Indra assuming the form of rakshasa, had stolen away Sagaras sacrificial horse.  