Mainstream biblical scholarship tracks the composition of the Torah (the first five books of the Bible) through a gradual process starting from traditional Mosaic oral codes to written records compiled during the mid-to-late 1st millennium BCE. While early fragments exist in ancient archaeological discoveries like the Dead Sea Scrolls, the authoritative text was systematically finalized and preserved by Jewish scribes over centuries of scriptural copy transmissions.
Yes, the Quran references previous scriptures in passages like Surah Al-Ma'idah (5:47), which tells the followers of the Gospel to judge by what God has revealed in it. From an academic perspective, this reflects the historical context of 7th-century Medina, where Jews and Christians were recognized as 'People of the Book' who possessed divine laws. While Islamic theology holds that modern biblical texts have suffered from textual corruption (tahrif), the Quran historically appeals to the core monotheistic truths remaining in those scriptures to validate Muhammad's message.