Regum et imperatorum apophthegmata

Plutarch

Plutarch. Moralia, Vol. III. Babbitt, Frank Cole, translator. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1931 (printing).

He also advised him that, among the men of influence in the cities, he should make friends of both the good and the bad, and that later he should use the former and abuse the latter.

Philon [*](Probably the man mentioned by Demosthenes, Oration xix. 140 (p. 384).) the Theban had been his benefactor and host during the time he spent as a hostage in Thebes, but later would not accept any gift from him; whereupon Philip said to him, Do not deprive me of my invincibility by letting me be outdone in benefactions and favours.