the Messenger of Allah forbade selling surplus water. The keeper of al-Wahat sold the surplus water of al-Wahat, and 'Abdullah bin 'Arm disapproved of that.
أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى عَنْ بَيْعِ فَضْلِ الْمَاءِ وَبَاعَ قَيِّمُ الْوَهْطِ فَضْلَ مَاءِ الْوَهْطِ فَكَرِهَهُ عَبْدُ اللَّهِ بْنُ عَمْرٍو