Mahabharata 12.221.55
मातरं पितरं वृद्धमाचार्यमतिथिं गुरुम्गुरुवन्नाभ्यनन्दन्त कुमारान्नान्वपालयन्
mātaraṃ pitaraṃ vṛddhamācāryamatithiṃ gurumguruvannābhyanandanta kumārānnānvapālayan
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book