Sophocles, Fragment 873

Whoever does business with a tyrant is

That man’s slave, even if he starts out free.

ὅστις γὰρ ὡς τύραννον ἐμπορεύεται

κείνου ‘στι δοῦλος, κἂν ἐλεύθερος μόλῃ.

Sophocles?