"But Peter said, Silver and gold have I none; but what I have, that give I thee. In the name of Jesus Christ of Nazareth, walk." — Acts 3:6 (ASV)
In the name (εν τω ονοματ). The healing power is in that name (Page) and Peter says so. Cf. Luke 9:49; 10:17; Acts 4:7,10; 19:27; 16:18.
Walk (περιπατε). Present imperative, inchoative idea, begin to walk and then go on walking. But the beggar does not budge. He knows that he cannot walk.