Abbott-Smith Manual Greek Lexicon
ἰδού (G2400)
200 ἰδού , [in LXX chiefly for הִנֵּה ,] prop. imperat. 2 aor. mid. of ὁράω , used as a demonstrative particle , with frequency much greater in LXX and NT than in cl. (v. M, Pr. , 11), lo , behold , see : Mt 10:16 11:8 13:3 , Mk 3:32 , Lk 2:48 , I Co 15:51 , Ja 5:9 , Ju 14 , Re 1:7 , al.; after gen. absol., Mt 1:20 2:1 , 13 12:46 , al.; καὶ ἰδού , Mt 2:9 (and freq.), Lk 1:20 10:25 , Ac 12:7 , al.; in elliptical sentences, taking the place of copula or predicate (like הִנֵּה in Heb.), Mt 3:17 , Lk 5:12 22:31 , 47 , Ac 8:27 , 36 al.
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain