Agniveshyagrihyasutra 3.8.3.3

3.8.3.3

imāṃ diśaṃ manuṣyāṇāṃ bhūyiṣṭhānuvirohatu ityuttarato dūrvāstambaṃ kāśānāṃ stambamāhara rakṣasāmapahatyai \

may it grow abundantly along this direction of men'—thus in the north, a clump of dūrvā grass; 'Bring a clump of kāśa grass for the slaying of the demons;