1400 years ago people thought that milk came from the white fat near the nipples. However today this turned out to be false. Milk is produced in mammary glands which in turn get the nutrients directly from the blood stream. The blood stream gets it nutrients from the digestive system.
٦٦ وَإِنَّ لَكُمْ فِي الْأَنْعَامِ لَعِبْرَةً ۖ نُسْقِيكُمْ مِمَّا فِي بُطُونِهِ مِنْ بَيْنِ فَرْثٍ وَدَمٍ لَبَنًا خَالِصًا سَائِغًا لِلشَّارِبِينَ
"We give you drink, from their bellies digested food and blood". No mistakes in the Quran.
How could an illiterate man who lived 1400 years ago have known where milk comes from?
Cow's milk is is primarily composed of water.
Milk CompositionIn general, the gross composition of cow's milk in the U.S. is 87.7% water, 4.9% lactose (carbohydrate), 3.4% fat, 3.3% protein, and 0.7% minerals (referred to as ash). Milk composition varies depending on the species (cow, goat, sheep), breed (Holstein, Jersey), the animal's feed, and the stage of lactation. Although there are minor variations in milk composition, the milk from different cows is stored together in bulk tanks and provides a relatively consistent composition of milk year round in the U.S.
The words "water" and "milk" in Quran 16:65-66 are separated by 88 letters. Today we know that cow's milk is 88% water.
How could an illiterate man who lived 1400 years ago have known about the water composition of milk?
The Quran (Koran, the book of Islam) contains scientific knowledge that could not have been known 1400 years ago. It ranges from basic arithmetics to the most advanced topics in astrophysics. You are invited to go through those miracles and judge for yourself.