Was strengthened (ενισχυθη). First aorist passive indicative of ενισχυω, to receive strength (ισχυς), comparatively late verb and here only in the N.T. save Luke 22:43 where it is doubtful. Poor verse division. This clause belongs in sense to verse Acts 9:18.

Some days (ημερας τινας). An indefinite period, probably not long, the early period in Damascus before Saul left for Arabia (Galatians 1:13-24).