faqih-3975Vol. 3, p. 272
"نَهَى رَسُولُ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ أَنْ يُشَابَ اَللَّبَنُ بِالْمَاءِ لِلْبَيْعِ".
Hadith.3981 - Isma'il ibn Muslim narrated from Abu Abdullah (as): "The Messenger of Allah (swt) (peace and blessings be upon him and his family) forbade mixing milk with water for sale."