Sitting on Kusha grass, with Kusha in hand, and binding his hairs with Kusha, he should surround himself with Kusha and have Kusha for robes.
कुशोच्चयनिषण्णः सन् कुशहस्तः कुशैः शिखी। कुशैः परिवृतस्तस्मिन् मध्ये छन्नः कुशैस्तथा॥