अविश्रामं वहेद्भारं शीतोष्णं च न विन्दति ।
ससन्तोषस्तथा नित्यं त्रीणि शिक्षेत गर्दभात् ॥
aviśrāmaṁ vahed bhāraṁ śītoṣṇaṁ ca na vindati |
sasantoṣas tathā nityaṁ trīṇi śikṣeta gardabhāt ||
(Cāṇakya-nīti)
“Carrying a load without rest, disregarding cold and heat, and being satisfied always—learn these three [virtues] from a donkey.”