Business Transactions which are Forbidden - Section 1 Mishkat al-Masabih 2858
Arabic hadith text
وَعنهُ قَالَ: نهى رَسُول الله عَن بيع فضل المَاء. رَوَاهُ مُسلم
Translation
He said that God’s Messenger forbade the sale of excess water. Muslim transmitted it.