Albert Barnes Commentary Acts 4:14

"And seeing the man that was healed standing with them, they could say nothing against it." — Acts 4:14 (ASV)

They could say nothing. The presence of the man who was healed was an unanswerable fact proving the truth of what the apostles alleged. The miracle was so public, clear, and decisive, and the man who was healed was so well known, that there was no evasion or subterfuge by which they could escape the conclusion to which the apostles were leading them. It showed significant gratitude in the man who was healed that he was present on this occasion, and it demonstrated that he was deeply interested in what happened to his benefactors. The miracles of Jesus and His apostles were such that they could not be denied; and therefore, the Jews did not attempt to deny that they performed them (John 11:45–46; Acts 19:36).