Guess what? The Gospel of Matthew was not the Gospel of Matthew we have today!
While there is no trace of our Four Gospels previous to the year 150 A.D., and while we do not know who it was after that time that wrote or compiled them, or exactly when they did it, the testimony of the early Fathers as to one of them may throw some light on the subject. Long before our Gospel of Matthew was known, Papias spoke of the "Gospel According to the Hebrews," and said that it contained a history of a woman accused of many sins before the Lord (Euseb., Eccl. Hist., iii. 39). Coming down later in time we find that both Eusebius and Irenaeus agree in saying that the Ebionites used only one Gospel; but Eusebius said it was called the "Gospel According To The Hebrews" (Eccl. Hist., iii. 27), while Irenaeus said it was the "Gospel According to Matthew" (Adv. Her., i 26). Moreover, both Epiphanius (403 A.D.) and Jerome (420 A.D.) say that the "Gospel according to the Hebrews" and the "Gospel according to Matthew" were the same book under different names. As the "Gospel according to the Hebrews" was in existence and in use first, the deduction is quote plain that some one subsequently forged Matthew's name to it. So you should understand that when you read that the Ebionites used only one Gospel and one Gospel only, and read that it was called "The Gospel of Matthew" then it in reality does not mean the Gospel of Matthew that we are familiar today, but the "Gospel of the Hebrews."