Acts 22:16

why tarriest thou? According to the narrative in Acts 9:15 the message of Ananias had already proclaimed the gift of the Holy Ghost to Saul, and the favour of God had been shewn in the recovery of his sight. So the question of Ananias becomes parallel to that of St Peter in the house of Cornelius: "Can any man forbid water that these should not be baptized, which have received the Holy Ghost as well as we?"

arise, and be baptized Though the gift of the Spirit was announced, yet God directs that the means of grace, the sacrament of baptism, which the Apostle must offer to others, should also be received by himself.

and wash away thy sins The close connexion of the sacramental sign with renewing grace is spoken of in like terms by the Apostle in his Epistle to Titus (Acts 3:5) "according to His mercy He saved us, by the washing of regeneration, and the renewing of the Holy Ghost."

calling on the name of the Lord The oldest authorities give "calling on His name," which refers back to "the Just One." Probably the Textus Receptusis due to a desire to make the phrase accordant with Acts 2:21.