Jamieson, Fausset and Brown on Acts 23:15

15. Now ... ye with the council signify to the chief captain ... as though, &c.--That these high ecclesiastics fell in readily with this infamous plot is clear. What will not unscrupulous and hypocritical religionists do under the mask of religion? The narrative bears unmistakable internal marks of truth.

or ever he come near--Their plan was to assassinate him on his way down from the barracks to the council. The case was critical, but He who had pledged His word to him that he should testify for Him at Rome provided unexpected means of defeating this well-laid scheme.