The narrative of the cow in Surah 2:67–73 serves as a prime example of scriptural fusion—where distinct biblical laws are muddled together with later Jewish folklore and presented as a single historical miracle.
The Quranic author appears to have confused two unrelated laws from the Torah:
The Red Heifer (Numbers 19): A ritual involving the burning of a red cow for purification after touching a corpse.
The Unsolved Murder (Deuteronomy 21): A ritual involving breaking a heifer's neck to atone for a body found in a field when the killer is unknown.
The Quran "mashes" these together, taking the unsolved murder context but adding a miraculous resurrection where the dead man identifies his killer after being struck with a piece of the cow.
The Hebrew Bible is dogmatic that the heifer must be red (Adumah), symbolizing blood and the washing away of sin.
The Quran (2:69) changes this to "bright yellow," which scholars view as a linguistic or cultural drift from the original Semitic root for "tawny" or "brownish-red" into a more literal "yellow" in the 7th-century Arabian context.
The specific "back-and-forth" dialogue between Moses and the Israelites—where the people stubbornly demand specifics about the cow’s age, color, and work history (2:68-71)—is nowhere to be found in the Bible.
However, it is a prominent feature of Jewish Midrash (Midrash Tanhuma), which was written to explain why the law of the Red Heifer was so difficult to follow. The Quran presents this human, rabbinical teaching as a literal historical conversation.
In Jewish thought, the Red Heifer (Numbers 19) was an atonement for the Golden Calf (Exodus 32).
Midrash Tanhuma, Chukat 25:
It is like the son of a handmaid who made a mess in the king’s palace. The king said, 'Let his mother come and clean up the mess.' Similarly, God said, 'Let the Heifer come and atone for the Calf.'"
The author of the Quran didn't just "receive" this story; he followed the specific theological structure and parables of the 3rd-to-5th-century Jewish Midrash.
The Quranic author took the "Law of the Unworked Heifer" (Deuteronomy 21) and the "Midrash of the Red Heifer" (Tanhuma), mashed them together, and added a "resurrection miracle" to make the story more exciting for an Arabian audience. It essentially turns a symbolic legal ritual into a literal magic trick.