They brought Peter and John before the rulers, elders, and magistrates who asked them by what authority had they healed this impotent man. Acts 4:5-7 And it came to pass on the morrow, that their rulers, and elders, and scribes, 6 And Annas the high priest, and Caiaphas, and John, and Alexander, and as many as were of the kindred of the high priest, were gathered together at Jerusalem. 7 And when they had set them in the midst, they asked, By what power, or by what name, have ye done this?
Peter said by the NAME OF JESUS CHRIST. There is power in the name of Jesus. Acts 4:8-12 Then Peter, filled with the Holy Ghost, said unto them, Ye rulers of the people, and elders of Israel, 9 If we this day be examined of the good deed done to the impotent man, by what means he is made whole; 10 Be it known unto you all, and to all the people of Israel, that by the name of Jesus Christ of Nazareth, whom ye crucified, whom God raised from the dead, even by him doth this man stand here before you whole. 11 This is the stone which was set at nought of you builders, which is become the head of the corner. 12 Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.
The word of God declares Phil 2:9-11 Wherefore God also hath highly exalted him, and given him a name which is above every name: 10 That at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth; 11 And that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.
