One should eat food which is not forbidden in the scriptures, abstaining from food of every kind on days of the new moon and the full moon. One should, with senses controlled, answer calls of nature, facing the north.
भक्षयेच्छास्त्रदृष्टानि पर्वस्वपि विवर्जयेत्। उदङ्मुखश्च सततं शौचं कुर्यात् समाहितः॥