Bhagavad Gita, Chapter 6, Verse 11

Having in a cleanly spot established his seat, firm, neither too high nor too low, made of a cloth, a skin, and Kusha-grass, arranged in consecution.

Even something as simple as where and how someone sits down is treated here as worth real, deliberate care.

This might read as overly specific at first, but the underlying point is practical: a stable, comfortable, intentional setup genuinely supports the deeper practice that follows, it isn't just ceremonial detail.