Mahabharata 1.133.14

पिता मान्यो गुरुः श्रेष्ठो यदाह पृथिवीपतिःअशङ्कमानैस्तत्कार्यमस्माभिरिति नो व्रतम्

pitā mānyo guruḥ śreṣṭho yadāha pṛthivīpatiḥaśaṅkamānaistatkāryamasmābhiriti no vratam

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