An-Nahl 16:66

Wa-inna lakum fee al-anAAamilaAAibratan nusqeekum mimma fee butoonihi min baynifarthin wadamin labanan khalisan sa-ighan lishsharibeen

And indeed, for you in grazing livestock is a lesson. We give you drink from what is in their bellies - between excretion and blood - pure milk, palatable to drinkers.

Surely there is a lesson for you in the cattle. We provide you, out of what lies in their bellies between feces and blood, the (drink of) milk, pure and pleasant for those who drink.