Mahabharata 1.149.18

गुरुणा चाननुज्ञातो ग्राहयेद्यं सुतो ममन स कुर्यात्तया कार्यं विद्ययेति सतां मतम्

guruṇā cānanujñāto grāhayedyaṃ suto mamana sa kuryāttayā kāryaṃ vidyayeti satāṃ matam

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