"Matthew wrote down the sayings in Hebrew and each translated it as he was able", (Papias cited in Eusebius, H.E., 3.39; cf. 3.24).
"Matthew published a written gospel for the Hebrews in their own tongue, while Peter and Paul were preaching the gospel in Rome and founding the church there. After their passing, Mark also, the disciple and interpreter of Peter, transmitted to us in writing the things preached by Peter. Luke, the follower of Paul, set down in a book the Gospel preached by him. Lastly John, the disciple of the Lord, who had leaned back on His breast, once more set forth the Gospel, while residing at Ephesus in Asia." (Irenaeus, Against Heresies, 3.1.2; cf. Eusebius, H.E., 5.8)
"the traditional view of the four gospels which alone are undeniably authentic in the church of God on earth. First to be written was that of the one-time exciseman who became an apostle of Jesus Christ - Matthew; it was published for believers of Jewish origin, and was composed in Hebrew letters/language. Next came that of Mark, who followed Peter's instructions in writing it ... Next came that of Luke, who wrote for Gentile converts ... Last of all came John's." (Origen cited in Eusebius, H.E., 6.25).
"This, too, the Presbyter {John} says: 'Mark, who had been Peter's interpreter, wrote down carefully, but not in order, all that he remembered of the Lord's sayings and doings. For he had not heard the Lord or been one of his followers, but later, as I said, one of Peter's. Peter would adapt his teachings to the occasion, without making a systematic arrangement of the Lord's sayings, so Mark was quite justified in writing down some things just as he remembered them. For he had one purpose only-to leave out nothing that he had heard, and to make no misstatement about it.'" (Papias cited in Eusebius)