I recently bought a copy of Acts: A Handbook on the Greek New Testament (Waco, TX: Baylor University Press, 2003) by Martin M. Cully and Mikeal C. Parsons, available from Logos Bible Software.
In the comments on Acts 22:16, the following comment is offered on epikalesamenos (translated “calling”): “The whole process of baptism, washing of sins, and calling on the Lord’s name is portrayed as a single complex event.”
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