The reading is from Acts of the Apostles 4:23-31

In those days, when the apostles were released they went to their friends and reported what the chief priests and the elders had said to them. And when they heard it, they lifted their voices together to God and said, "Sovereign Lord, who didst make the heaven and the earth and the sea and everything in them, who by the mouth of our father David, thy servant, didst say by the Holy Spirit, 'Why did the Gentiles rage, and the peoples imagine vain things? The kings of the earth set themselves in array, and the rulers were gathered together, against the Lord and against his Anointed'- for truly in this city there were gathered together against thy holy servant Jesus, whom thou didst anoint, both Herod and Pontius Pilate, with the Gentiles and the peoples of Israel, to do whatever thy hand and thy plan had predestined to take place. And now, Lord, look upon their threats, and grant to thy servants to speak thy word with all boldness, while thou stretchest out thy hand to heal, and signs and wonders are performed through the name of thy holy servant Jesus." And when they had prayed, the place in which they were gathered together was shaken; and they were all filled with the Holy Spirit and spoke the word of God with boldness.