Having lost their knowledge of the Shrutis, and father had to acquire it again from those sons to whom they had come municated it. On account of this incident, the sons, who had thus to communicate the Mantras to their father, acquired the status of fathers.
वेदश्रुतिः प्रणष्टा च पुनरध्यापिता सुतैः। ततस्ते मन्त्रदाः पुत्राः पितृत्वमुपपेदिरे॥