And, being assembled together with them, commanded them that they should not depart from Jerusalem…
At the village near which I reside, there is a foundry for casting cannon. After cannon are east they are tested by the founders. They first put in a single charge. If the cannon can bear that they put in the double charge. If the cannon can bear that without bursting, then they are pronounced fit for the field of battle, or for the deck of a man-of-war. The casters act wisely, for should there be one flaw it is better that it should be detected in the foundry-yard than when in the act of being fired. Now the gospel was a new and untried instrument. It had to be tested, and where better than at Jerusalem? If it could stand the test there it could stand it anywhere. Peter fired the first gun, and three thousand were converted in one day. Moreover a great multitude of the priests were obedient unto Christ. The apostles could not but have faith in the power of the gospel when they saw the men who mocked and crucified Christ, and gloried in what they did, exclaiming, "Men and brethren, what shall we do?"
(Williams of Wern.)
Parallel VersesKJV: And, being assembled together with them, commanded them that they should not depart from Jerusalem, but wait for the promise of the Father, which, saith he, ye have heard of me.