Abbott-Smith Manual Greek Lexicon
κρούω (G2925)
9 κρούω , [in LXX: seq. ἐπί , Jg 19:22 , Ca 5:2 ( דִפק );] c, acc., τ. αὐλαίαν , Jth 14:14 *;] to strike , knock : at a door ( κόπτειν , in Att.), Mt 7:7 , 8 , Lk 11:9 , 10 12:36 , Ac 12:16 , Re 3:20 ; c. acc., τ. θύραν , Lk 13:25 , Ac 12:13 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain