δῆρις
From LSJ
πάντες γὰρ οἱ λαβόντες μάχαιραν ἐν μαχαίρῃ ἀπολοῦνται → all they that take the sword shall perish with the sword
English (LSJ)
ἡ,
A battle, contest, Il.17.158, al. (only in acc.): nom. in A. Supp.412 (lyr.), Emp.122.2 (personified), Epigr.Gr.343 (Germa); gen. δήριος A.Ag.942, δήρεως Suid.