Prajapati had a favourite son born of his mind by name Pulastya; and he had a powerful son begotten of cow by name Vaishravana.
पुलस्त्यो नाम तस्यासीन्मानसो दयितः सुतः। तस्य वैश्रवणो नाम गवि पुत्रोऽभवत् प्रभुः॥