A.T. Robertson Commentary Luke 1:58

"And her neighbors and her kinsfolk heard that the Lord had magnified his mercy towards her; and they rejoiced with her." — Luke 1:58 (ASV)

Had magnified (εμεγαλυνεν). Aorist active indicative. Same verb as in verse 46.Rejoiced with her (συνεχαιρον αυτη). Imperfect tense and pictures the continual joy of the neighbours, accented also by συν- (cf. Php 2:18) in its mutual aspect.