अत्रिसंहिता - गुरु ऋण

एकमप्यक्षरं यस्तु गुरुः शिष्ये निवेदयेत् ।
पृथिव्यां नास्ति तद्द्रव्यं यद्दत्वा ह्यनृणीभवेत् ॥

- अत्रिसंहिता

Even if the teacher has taught you just one letter he has helped you a lot. This help can not be repaid by giving any gift in this world.

- Atri Samhita