acts 9:7 And the men which journeyed with him stood speechless, hearing a voice, but seeing no man. - Free Bible Online

      7. the men . . . stood speechless--This may mean merely that they remained so; but if the standing posture be intended, we have only to suppose that though at first they "all fell to the earth" (Ac 26:14), they arose of their own accord while Saul yet lay prostrate.
      hearing a--rather "the"
      voice--Paul himself says, "they heard not the voice of Him that spake to me" (Ac 22:9). But just as "the people that stood by heard" the voice that saluted our Lord with recorded words of consolation and assurance, and yet heard not the articulate words, but thought "it thundered" or that some "angel spake to Him" (Joh 12:28, 29) --so these men heard the voice that spake to Saul, but heard not the articulate words. Apparent discrepancies like these, in the different narratives of the same scene in one and the same book of Acts, furnish the strongest confirmation both of the facts themselves and of the book which records them.

JFB.