A.T. Robertson 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 against it (ουδεν ειχον αντειπειν). Imperfect again, they kept on having nothing to say against it. The lame man was standing there before their eyes in proof of what Peter had said.