मलमुत्सृज्य चोत्थाय न पश्येच्चैव तन्मलम् । उद्धृतेन जलेनैव शौचं कुर्याज्जलाद्बहिः १२ ।
After evacuating the bowels, the faeces should not be looked at. Water drawn out in a vessel should be used for cleaning (i.e. no one should sit inside the tank or river-water for cleaning purpose).