You might hear this from your Muslim friend.
Don't believe it.
However, it is a different story for the Quran. Not 'corrupted' per se, how can a made-up story book be 'corrupted'? but neither a book that tells about Yahweh, the creator and his incarnated Son (that is of the same substance) Yeshua. In fact the Quran is to a large degree a vehemently Arian diatribe against Christian faith.
But, oddly, the Quran tells us the Bible is NOT corrupted, or even corruptible!.
Surah 29:46 -- the Quran endorses the Bible.
Surah 3:3-4 -- The Torah and 'Gospel' revealed before.
Surah 18:27 -- the Bible is inviolate.
The horns of the dilemma
Horn 1: The prophetic stories are reliable. If that’s true then the Quran is false because it directly contradicts them.
Horn 2: The prophetic stories are unreliable. But in that case, Surah 10:94 is incoherent.
Surah 10:94
The typical Muslim counter to this information is that it is talking about the texts (particularly identified as 'Torah' and 'Gospel') available at Mohammad's time, but they've been corrupted since then.
Spot the problem?
Of course: the Quran, an 'eternal' book doesn't qualify its statements: they are absolute: always, inevitably and inescapably preserved. Or, Allah has no clue about the future of the texts, or no ability to preserve them through time.
So, my Muslim friend, either the Quran is wrong, or...it is wrong. If the text is corrupted, it is wrong because it says that its preserved; if its preserved, it is wrong, because the Quran contradicts both the Torah and the Gospel, and all the other prophets and all the commentaries (Letters) on the Gospel.
Which is it?
Now we know we have a very secure biblical text, and a very insecure quranic text!
Indeed, all the above aside, we have extant texts from the time of alleged Mohammad that tell us the Bible has not been corrupted post this time.
Early New Testament Manuscripts
Papyrus 52 (P52) (c. 125–150 CE): A small fragment from the Gospel of John, widely considered the oldest surviving New Testament text.
Papyrus 46 (P46) (c. 175–225 CE): An early collection of Pauline epistles.Papyrus 66 (P66) (c. 200 CE): A substantial portion of the Gospel of John
Early Complete Bibles (Codices)
Codex Vaticanus (c. 4th century CE): Housed in the Vatican Library, one of the oldest and most complete Greek Bibles
Codex Sinaiticus (c. 4th century CE): Discovered at St. Catherine's Monastery, containing the oldest substantially complete Christian Bible.
The Syriac Peshitta is the standard version of the Bible used by churches in the Syriac tradition. Most scholars date the Old Testament portion to the 1st or 2nd century AD and the New Testament to the 2nd to 5th centuries AD. The word "Peshitta" means "simple" or "common" in Syriac, which is a dialect of Aramaic
Your turn, Islam!
see https://youtu.be/VC9BUwofQ_E for further background