Abbott-Smith Manual Greek Lexicon
δύο (G1417)
135 δύο , numeral , indecl. exc. in dat., δυσί, δυσίν (Attic δυοῖν ), two : Mt 19:6 , Mk 10:8 , Jo 2:6 , al.; with pl. noun, Mt 9:27 10:10 , al.; οἱ, τῶν, τοὺς δ. , Mt 19:5 20:24 , Mk 10:8 , Eph 2:15 , al.; δ. ἐξ , Lk 24:13 ; distrib., ἀνὰ, κατὰ δ. , two and two, two apiece : Lk 10:1 (WH, ἀνὰ δ. [δύο] ), Jo 2:6 , I Co 14:27 ; δύο δύο (= ἀνὰ δ. , as LXX, Ge 6:19 for שְׁנַיִם שְׁנַיִם , but not merely "Hebraism," cf. μυρία μυρία , Æsch., Pers. , 981, and for usage in π. and MGr., v. M, Pr. , 21, 97), Mk 6:7 ; εἰς δ. ( two and two , Xen., Cyr. , 7, 5, 17), into two parts , Mt 27:51 , Mk 15:38 .
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain