They were always observant of a pure conduct and were never obstructed by their senses. Those great, Rishis attended that sacrifice and performed its various rites.
वृत्ते शुद्धे स्थिता नित्यमिन्द्रियैश्चाप्यबाधिताः। उपातिष्ठन्त तं यज्ञं यजन्तस्ते महर्षयः॥