John Gill

And by the hands of the apostles were many signs and wonders wrought,.... That is, by their means, or by them as instruments, or through the imposition of their hands on persons, many miraculous and wonderful cures, as well as other extraordinary actions, were performed: among the people; the common people, who attended in great numbers on their ministry, when the chief men and rulers of the nation despised them. And they were all with one accord in Solomon's porch; which is to be understood not of the whole church, nor of the hundred and twenty disciples, but of the twelve apostles, who met in this place to preach the Gospel to the people; and they were agreed in their doctrine and practice, and were united in their affections to one another. Of Solomon's porch; see Gill on Joh 10:23. These words, with what follow to the 15th verse, are to be read in a parenthesis.