Milk

وَإِنَّ لَكُمْ فِى ٱلْأَنْعَـٰمِ لَعِبْرَةً ۖ نُّسْقِيكُم مِّمَّا فِى بُطُونِهِۦ مِنۢ بَيْنِ فَرْثٍ وَدَمٍ لَّبَنًا خَالِصًا سَآئِغًا لِّلشَّـٰرِبِينَ

In livestock, too, you have a lesson- We give you a drink from the contents of their bellies, between waste matter and blood, pure milk, sweet to the drinker.

مَّثَلُ ٱلْجَنَّةِ ٱلَّتِى وُعِدَ ٱلْمُتَّقُونَ ۖ فِيهَآ أَنْهَـٰرٌ مِّن مَّآءٍ غَيْرِ ءَاسِنٍ وَأَنْهَـٰرٌ مِّن لَّبَنٍ لَّمْ يَتَغَيَّرْ طَعْمُهُۥ وَأَنْهَـٰرٌ مِّنْ خَمْرٍ لَّذَّةٍ لِّلشَّـٰرِبِينَ وَأَنْهَـٰرٌ مِّنْ عَسَلٍ مُّصَفًّى ۖ وَلَهُمْ فِيهَا مِن كُلِّ ٱلثَّمَرَٰتِ وَمَغْفِرَةٌ مِّن رَّبِّهِمْ ۖ كَمَنْ هُوَ خَـٰلِدٌ فِى ٱلنَّارِ وَسُقُوا۟ مَآءً حَمِيمًا فَقَطَّعَ أَمْعَآءَهُمْ

Here is a picture of the Garden promised to the pious: rivers of water forever pure, rivers of milk forever fresh, rivers of wine, a delight for those who drink, rivers of honey clarified and pure, [all] flow in it; there they will find fruit of every kind; and they will find forgiveness from their Lord. How can this be compared to the fate of those stuck in the Fire, given boiling water to drink that tears their bowels?