It is narrated from Yahya Mazni that Dhahhak bin Khalifah dug a canal from 'Arid (a valley in Madinah), passing through the land of Muhammad bin Maslamah. He (Muhammad) forbade it. Dhahhak said: Why do you forbid it? You will benefit from it; you may water your land first and last, and there will be no harm. Muhammad did not agree. Dhahhak reported this to Sayyiduna Umar (may Allah be pleased with him). Sayyiduna Umar (may Allah be pleased with him) called Muhammad bin Maslamah and said: Allow it. Muhammad said: I will not allow it. Sayyiduna Umar (may Allah be pleased with him) said: Do you prevent your Muslim brother from something in which there is benefit for him and also benefit for you? You may also take water first and last, and there will be no harm to you. Muhammad said: By Allah! I will not allow it. Sayyiduna Umar (may Allah be pleased with him) said: The canal will be made to flow even if it passes over your belly. Then Sayyiduna Umar (may Allah be pleased with him) ordered Dhahhak to let the canal flow through the land of Muhammad bin Maslamah. Dhahhak did so.