Alliance with Thracian kings
Matthaiou, Ἔξι Ἀττικὲς ἐπιγραφὲς 97-116 Date: 357 BC
          . . . [1]   . . . [2]   . . .  cities  . . .  shall help [according to the treaty which?]  the Athenians and the allies [made] with Berisades
        son of [Seuthes]  and Amadokos son of Medodokos and Kersebleptes
        (5) son of Kotys;[3] and if one of the cities that  . . .   is liable to pay tribute (phorous) to Berisades and Amadokos
        and Kersebleptes and also  . . .  to the Athenians,
        does not pay the Athenians  . . . , 
        Berisades and Amadokos
        (10) and Kersebleptes shall exact them as far as possible; and if  . . .   they do not pay to Berisades or Amadokos or Kersebleptes the tribute (phorous)  . . . ,
        the Athenians and the [generals]  in charge of the force (dunamei) shall exact it
        as far as possible; and the Greek cities [in the area of Thrace?]  (15) paying the traditional tribute (phoron) to Berisades and Amadokos
        and Kersebleptes and to the Athenians
         . . .  shall be free and autonomous,
        being allies of the Athenians as they swore,
        and of Berisades and Amadokos and Kersebleptes;[4] and if
        (20) any of the cities defects from the Athenians, Berisades
        and Amadokos and Kersebleptes shall help  . . .    . . . ; but if  . . .    . . . [5]