Tertullian

“ To show the unauthorized and unwarrantable character of these alterations, omissions, additions, and corruptions, the Catholic Christians asserted that their copies of St. Luke’s Gospel were more ancient than Marcion’s (so Tertullian in chap. iii. and iv. of this Book iv.) ; and they maintained also the genuineness and integrity of the unadulterated Gospel, in opposition to that which had been curtailed and altered by him (chap. v.) . ”

“ In ver. 38, instead of the words ἐν τῇ δευτέρᾳ φυλακῇ, καὶ ἐν τῇ τρίτῃ φυλακῇ, he read ἐν τῇ ἑσπερινῇ φυλακῇ. In chap. xiii. he omitted the first five verses, whilst in the 28th verse of the same chapter, where we read, “When ye shall see Abraham, and Isaac, and Jacob, and all the prophets in the kingdom of God, and ye yourselves thrust out,” he read (by altering, adding, and transposing) , “When ye shall see all the just in the kingdom of God, and you yourselves cast out, and bound without, there shall be weeping and gnashing of teeth.” ”

“ But the reason he assigns for the erasure—‘respiciens Psalmi prophetiam’—shows that in this, as well as in the few other instances which we have already named, where Tertullian has charged Marcion with so altering passages, his memory deceived him into mistaking Matthew for Luke, for the reference to the passage in the Psalm is only given by St. Matthew xxvii. 35.
5. On an impartial review of these alterations, some seem to be but slight; others might be nothing but various readings; but others, again, are undoubtedly designed perversions. ”