Pseudo-Xenophon (Old Oligarch), Constitution of the Athenians
E. C. Marchant, Ed.

[18] In addition, were the allies not to go away for judicial proceedings, they would honour only those of the Athenians who sail out from the city, namely generals, trierarchs, and ambassadors. As it is now, each one of the allies is compelled to flatter the Athenian populace from the realization that judicial action for anyone who comes to Athens is in the hands of none other than the populace (this indeed is the law at Athens); in the courts he is obliged to entreat whoever comes in and to grasp him by the hand. In this way the allies have become instead the slaves of the Athenian people.