Sanskrit

शुचौ देशे प्रतिष्ठाप्य स्थिरमासनमात्मनः। नात्युच्छ्रितं नातिनीचं चैलाजिनकुशोत्तरम्।।6.11।।

Summary

Having chosen a holy place, let him sit in a firm posture on a seat that is neither too high nor too low, and cover it with a grass mat, a deer skin, and a cloth.