Malik related to me from Amr ibn Yahya al-Mazini from his fatherthat ad-Dahhak ibn Khalifa watered his irrigation ditch from a largesource of water. He wanted to have it pass through the land ofMuhammad ibn Maslama, and Muhammad refused. Ad-Dahhak said to him,"Why do you prevent me? It will benefit you. You can drink from itfirst and last and it will not harm you." Muhammed refused so ad-Dahhak spoke about it to Umar ibn al-Khattab, and Umar ibn al-Khattabsummoned Muhammad ibn Maslama and ordered him to clear the way.Muhammad said, "No." Umar said, "Why do you prevent your brother fromwhat will benefit him and is also useful for you? You will take waterfrom it first and last and it will not harm you."Muhammadsaid, "No, by Allah!" Umar said, "By Allah, he will pass it through,even if it is over your belly!" Umar ordered him to allow its passageand ad-Dahhak did so.
USC-MSA web (English) reference: Book 36, Hadith 33
Arabic reference: Book 36, Hadith 1437