Abbott-Smith Manual Greek Lexicon
ἀεί (G104)
7 ἀεί , adv. , [in LXX: Is 42:14 ( מֵעוֹלָם ) 51:13 ( תָּמִיד ), Ps 94 (95):10 , al.;] ever ; of continuous time, unceasingly , perpetually : Ac 7:51 , 2 Co 4:11 6:10, Tit 1:12 , He 3:10 . Of successive occurrences, on every occasion (MM, VGT , s.v.): I Pe 3:15 , II Pe 1:12 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain