Mahabharata 13.107.46

गुरुणा वैरनिर्बन्धो न कर्तव्यः कदाचनअनुमान्यः प्रसाद्यश्च गुरुः क्रुद्धो युधिष्ठिर

guruṇā vairanirbandho na kartavyaḥ kadācanaanumānyaḥ prasādyaśca guruḥ kruddho yudhiṣṭhira

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