Agniveshyagrihyasutra 3.6.1.8

3.6.1.8

atrainamajaṃ cityante 'balena śulbena badhnāti ajo bhāgastapasā taṃ tapasva taṃ te śocistapatu taṃ te arciḥ \

Then, at the edge of the pyre, he ties this goat with a weak cord: "The goat is your share; scorch it with heat; let your heat scorch it, let your flame [scorch it];