وَاِنَّ لَكُمْ فِى الْاَنْعَامِ لَعِبْرَةً ۚ نُسْقِيْكُمْ مِّمَّا فِيْ بُطُوْنِهٖ مِنْۢ بَيْنِ فَرْثٍ وَّدَمٍ لَّبَنًا خَالِصًا سَاۤىِٕغًا لِّلشّٰرِبِيْنَ ( النحل: ٦٦ )
Wa inna lakum fil an'aami la'ibrah; nusqeekum mimmmaa fee butoonihee mim baini farsinw wa damil labanann khaalisan saaa'ighallish shaaribeen (an-Naḥl 16:66)
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. (An-Nahl  : 66)
1 Mufti Taqi Usmani
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.