1 The Apostle Peter, therefore, after the resurrection of the Lord, and His assumption into the heavens, being desirous of filling up the number of the twelve apostles, and in electing into the place of Judas any substitute who should be chosen by God, thus addressed those who were present: “Men [and] brethren, this Scripture must needs have been fulfilled, which the Holy Ghost, by the mouth of David, spoke before concerning Judas, which was made guide to them that took Jesus.
For he was numbered with us:... Let his habitation be desolate, and let no man dwell therein; and, His bishoprick let another take;” — thus leading to the completion of the apostles, according to the words spoken by David. Again, when the Holy Ghost had descended upon the disciples, that they all might prophesy and speak with tongues, and some mocked them, as if drunken with new wine, Peter said that they were not drunken, for it was the third hour of the day; but that this was what had been spoken by the prophet: “It shall come to pass in the last days, says God, I will pour out of my Spirit upon all flesh, and they shall prophesy.” The God, therefore, who did promise by the prophet, that He would send His Spirit upon the whole human race, was He who did send; and God Himself is announced by Peter as having fulfilled His own promise.
Source: Adversus haereses (New Advent)