Perseus analysis of θάμβησεν:

θαμβέω (to be astounded): aor ind act 3rd sg (homeric ionic)

LSJ entry

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θαμβέω

II. later also causal, alarm, LXX 2 Ki. 22.5; τοὺς ὀφθαλμούς τινος PMag.Par. 1.237:—Pass., to be astounded, Ev.Marc. 1.27, POxy. 654.7, PMag. Leid.W.11.39; τεθαμβημένος astounded, Plu. Brut. 20; διά τινος Id. Caes.[45].