Peter explained that Jesus healed the man, and they should repent.

Acts 3:12-16

12 When Peter saw that, he said to the crowd, “Fellow Israelites, ◄you should not be surprised about what has happened to this man!/why are you so surprised about what has happened to this man?► [RHQ] And you should not stare at us, either! You seem to [RHQ] think that the two of us enabled this man to walk because we (exc) ourselves are powerful or because we please God very much! 13 So I will tell you what is really happening. Our ancestors, including Abraham, Isaac, and Jacob, worshipped God. And now he has greatly honored Jesus, who always served him. Your leaders brought Jesus to the governor, Pilate, so that his soldiers would kill him. And God considers that in front of Pilate you were the ones who rejected Jesus as your king, after Pilate had decided that he should release Jesus. 14 Although Jesus always did what was right/just and good, you rejected him. Pilate wanted to release him, but you urgently asked Pilate to release ◄a murderer/someone who had killed people►! 15 God considers that you killed Jesus, the one who gives people eternal life. But God has greatly honored him ◄by causing him to become alive again after he died/by raising him from the dead►. Many of us saw him after that, and now we (exc) are telling you about it. 16 It is because we two trusted in what Jesus [MTY, PRS] could do, that he made this man, whom you see and know, strong again. Yes, it is because we (exc) trusted in Jesus that he has completely healed this man for all of you to see.”