Abbott-Smith Manual Greek Lexicon
ἀν-αίτιος (G338)
2 ἀν-αίτιος , -ον ( αἰτία ), [in LXX: De 19:10 , 13 21:8 , 9 ( נָקִי ), Da LXX TH Sus 62 , always of αἷμα (of. MM, VGT , s.v.)*;] guiltless , innocent : Mt 12:5 , 7 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain