New American Standard Bible (©1995)
Therefore they spent a long time there speaking boldly with reliance upon the Lord, who was testifying to the word of His grace, granting that signs and wonders be done by their hands.
King James Bible
Long time therefore abode they speaking boldly in the Lord, which gave testimony unto the word of his grace, and granted signs and wonders to be done by their hands.
Darby Bible Translation
They stayed therefore a good while, speaking boldly, confiding in the Lord, who gave witness to the word of his grace, giving signs and wonders to be done by their hands.
English Revised Version
Long time therefore they tarried there speaking boldly in the Lord, which bare witness unto the word of his grace, granting signs and wonders to be done by their hands.
Online Parallel Bible