Acts 19:5

“And hearing, they were baptized in the name of the Lord Jesus.” Here you see baptism repeated in the case of these Ephesian converts. Water baptism is a Jewish institution, constant and exceedingly prevalent since the days of Moses, symbolizing the work of the Spirit, as the bloody sacrifices the work of Christ. A Jew had to be baptized with water every time he contracted ceremonial defilement before he was allowed to enter the tabernacle and enjoy its service. Doubtless many a Jew was baptized a thousand times in his life, these expurgatory catharisms being frequent as the bloody sacrifices. These Ephesian converts, Apollos and Paul were all Jews, accustomed from time immemorial to baptize freely and repeatedly pursuant to the Levitical ritual. Apollos had initiated them into the Johanic dispensation by water baptism, thinking it was still in vogue. Paul is preaching in the dispensation of the Holy Ghost, who is given by the ascended and glorified Messiah, whom it is pertinent that all publicly confess by baptism in His name.