Kautilya's Arthashastra 7.6.30

7.6.30

"kṛtapraṇāśaḥ śaktihānir vidyāpaṇyatvam āśānirvedo deśalaulyam aviśvāso balavadvigraho vā parityāgasthānam" ity ācāryāḥ //

My teacher says that whoever has failed to achieve profit from his works, lost his strength, or made his learning a commercial article, or is very greedy, inquisitive to see different countries, dead to the feelings of friendship, or has strong enemies, deserves to be abandoned.