Mahabharata 1.113.13

क्रुद्धं तं तु पिता दृष्ट्वा श्वेतकेतुमुवाच हमा तात कोपं कार्षीस्त्वमेष धर्मः सनातनः

kruddhaṃ taṃ tu pitā dṛṣṭvā śvetaketumuvāca hamā tāta kopaṃ kārṣīstvameṣa dharmaḥ sanātanaḥ

Our plain-language meaning of this verse is waiting for scholar review.