Mahabharata 13.100.21

राजर्त्विजं स्नातकं च गुरुं श्वशुरमेव चअर्चयेन्मधुपर्केण परिसंवत्सरोषितान्

rājartvijaṃ snātakaṃ ca guruṃ śvaśurameva caarcayenmadhuparkeṇa parisaṃvatsaroṣitān

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