A.T. Robertson Commentary Acts 8:36

"And as they went on the way, they came unto a certain water; and the eunuch saith, Behold, [here is] water; what doth hinder me to be baptized?" — Acts 8:36 (ASV)

What doth hinder me to be baptized? (Τ κωλυε με βαπτισθηναι?). Evidently Philip had said something about baptism following faith and conversion. Verse 37 is not a genuine part of Acts, a western addition. Later baptismal liturgies had it.