Hiranyakeshigrihyasutra 2.8.19.7

2.8.19.7

dakṣiṇataḥ prācīnāvītino dakṣiṇāpravaṇe dakṣiṇāgrairdarbhaiḥ pratyagapavargāṇyāsanāni kalpayanti \9\ \\19\\

Towards the south, with their sacrificial cords suspended over their right shoulders, in a place inclined towards the south, they arrange seats of southward-pointed Darbha grass, so that they end in the west—