A.T. Robertson Commentary Acts 9:19

"and he took food and was strengthened. And he was certain days with the disciples that were at Damascus." — Acts 9:19 (ASV)

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