Eusebius, Praeparatio Evangelica (Preparation for the Gospel)
The fifteen books of Eusebius's Preparation for the Gospel have been read by me, in which he refutes for the most part the vain babbling of the Greeks, showing how they remained at variance with themselves throughout. At the start of the fifteenth book, and at its end, he mentions another treatise, which he entitled Demonstration of the Gospel, a sequel to the Preparation: the one is nearly a refutation of Greek error, the other a confirmation of the Gospel message.
Greek
Ἀνεγνώσθη εὐαγγελικῆς προπαρασκευῆς ΕΥΣΕΒΙΟΥ λόγοι ιέ, ἐν οἷς ὡς ἐπίπαν τὴν Ἑλλήνων ματαιολογίαν ἐλέγχει, καὶ ὡς ἀσύμφωνοι αὐτοὶ πρὸς ἑαυτοὺς διετέλεσαν. μέμνηται δὲ ἐν ἀρχῇ τοῦ πεντεκαιδεκάτου λόγου καὶ ἐν τῷ τέλει ἑτέρας πραγματείας, ἣν εὐαγγελικὴν ἀπόδειξιν ἐξωνόμασε, ἀκόλουθον οὖσαν τῇ εὐαγγελικῇ προπαρασκευῇ, ὅτι ἡ μὲν ἔλεγχός ἐστι σχεδὸν τῆς Ἑλλήνων πλάνης, ἡ δὲ βεβαίωσις τοῦ κηρύγματος τοῦ εὐαγγελικοῦ.