he commanded them to be baptized - not doing it with his own hands, as neither did Paul, save on rare occasions (1Co 1:14-17; compare Act 2:38; Joh 4:2).
prayed ... him to tarry certain days - “golden days” [Bengel], spent, doubtless, in refreshing Christian fellowship, and in imparting and receiving fuller teaching on the several topics of the apostle’s discourse.