पित्र्ये निवापे जप्ये च सन्ध्यास्वाचमनेऽपि च । विष्कम्भितं पुनश्चैवं जानुं भूमौ निपातयेत् ॥ २०९॥
In offering libations to ancestors, in muttering prayers, during twilight rituals, and in performing ācamana (sipping water ceremonially), one should sit with legs spread out, and place one knee on the ground.
english translation