An Nahl Ayah 66

وَإِنَّ لَكُمْ فِى ٱلْأَنْعَـٰمِ لَعِبْرَةً‌ۖ نُّسْقِيكُم مِّمَّا فِى بُطُونِهِۦ مِنۢ بَيْنِ فَرْثٍ وَدَمٍ لَّبَنًا خَالِصًا سَآئِغًا لِّلشَّـٰرِبِينَ ٦٦ And there is certainly a lesson for you in cattle: We give you to drink of what is in their bellies, from between digested food and blood: pure milk, pleasant to drink.