συμβόλαιος
From LSJ
οὕτως ἐξ ἐχθρῶν αὐτοκτόνα πέμπετο δῶρα, ἐν χάριτος προφάσει μοῖραν ἔχοντα μόρου → thus mutual gifts that bring death were bestowed by enemies, gifts that brought the lot of death in the name of a favor
English (LSJ)
α, ον,
A of or concerning contracts, αἱ ξ. δίκαι Th.1.77 (Hsch. has both ξυμβολιμαίας δίκας and συμβολαίας δίκας); otherwise expld. as δίκαι αἱ ἀπὸ συμβόλων, cf. σύμβολον 11.
German (Pape)
[Seite 979] zum Contracte gehörig, darauf Bezug habend, ξυμβόλαιαι δίκαι, Thuc. 1, 77.