To be fair, pretty much any work reuses concepts and themes, if not outright direct quotes, from earlier works. As Tim mentioned, you would be much better off showing how the New Testament authors, particularly whoever wrote Matthew, deliberately incorporated direct quotes from the Old Testament to make their hero appear to fufill prophecies.
My personal favorite is the Rodeo Jesus (riding two donkeys at once).
Yeah, that's a fun one. It involves someone writing in Greek not understanding a Semitic poetic convention, whereby the same thing is repeated slightly differently. Here are two examples:
From Ugarit, ca. 1400 BCE (
Ancient Near Eastern Texts, p. 144):
Whose fairness is like Anath's fairness?
Whose beauty is like Ashtart's beauty?
This helped explain why, though Anath appears in Semitic literature, nobody could find any temples dedicated to her nor images of her. Once they figured out that Anath and Ashtart were two different aspects of the same goddess, the mystery was solved.
The second example, involving the detail the author of Matthew took too literally, is Zechariah 9:9:
Rejoice greatly, O daughter of Zion!
Shout aloud, O daughter of Jerusalem!
Lo, your king comes to you;
triumphant and victorious is he,
humble and riding on an ass,
on a colt the foal of an ass.
Since Zion is the temple mount in Jerusalem, the daughter of Zion and the daughter of Jerusalem are one and the same. Likewise, the ass and the "colt the foal of an ass" are one and the same. In his eagerness to have Jesus fulfill the prophecy of Zech. 9:9, and because he didn't understand the poetic convention, the author of Matthew gave us Hokulele's "rodeo Jesus" (Mt. 21:6, 7):
The disciples went and did as Jesus had directed them; they brought the ass and the colt, and put their garments on them, and he sat thereon.
Fundamentalist apologists go through all kinds of verbal gymnastics trying to explain that Jesus only actually only sat on the mother donkey, who followed the colt out of maternal instinct. So the disciples led the colt, and the mother followed, carrying Jesus. Of course v. 7 above says Jesus sat
thereon, referring to the garments draped on both beasts.