When Lord Ṛṣabhadeva saw that the general populace was very antagonistic to His execution of mystic yoga, He accepted the behavior of a python in order to counteract their opposition. Thus He stayed in one place and lay down. While lying down, He ate and drank, and He passed stool and urine and rolled in it. Indeed, He smeared His whole body with His own stool and urine so that opposing elements might not come and disturb Him.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यर्हि वाव स भगवान् लोकमिमं योगस्याद्धा प्रतीपमिवाचक्षाणस्तत्प्रतिक्रियाकर्म बीभत्सितमिति व्रतमाजगरमास्थितः शयान एवाश्नाति पिबति खादत्यवमेहति हदति स्म चेष्टमान उच्चरित आदिग्धोद्देशः
yarhi vāva sa bhagavān lokamimaṃ yogasyāddhā pratīpamivācakṣāṇastatpratikriyākarma bībhatsitamiti vratamājagaramāsthitaḥ śayāna evāśnāti pibati khādatyavamehati hadati sma ceṣṭamāna uccarita ādigdhoddeśaḥ
SB 5.5.32