Dictionary entry

ἀμφότεροι

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

ἀμφότεροι, -αι, -α

(replaces ἄμφω in κοινή, v. M, Pr., 57; used of more than two, Pr., 80; MM, VGT, s.v.),

both of two: Mt 9:17, al.