27 Indeed Herod and Pontius Pilate met together with the Gentiles and the people of Israel in this city to conspire against your holy servant Jesus, whom you anointed. 28 They did what your power and will had decided beforehand should happen. 29 Now, Lord, consider their threats and enable your servants to speak your word with great boldness. 30 Stretch out your hand to heal and perform signs and wonders through the name of your holy servant Jesus.”31 After they prayed, the place where they were meeting was shaken. And they were all filled with the Holy Spirit and spoke the word of God boldly.
Events proved the prophecy to be true, so that they should believe even more firmly.
We, too, should build up our faith with things that have been predicted.
Luke says the God not only heard their payer but demonstrated this with a visible sign from heaven. It is rare and extraordinary for God to reveal his power by shaking a place. But it resulted in the apostles’ receiving that for which they had prayed. This is an example for us of the permanent benefit of prayer.