from 'Abd Allah ibn 'Amr, that the manager of his land in al-Waht (74) wrote to him, informing him that he had watered his land, and there remained a surplus of water for him that was sought for thirty thousand. 'Abd Allah ibn 'Amr wrote to him: "Keep your turn (qild), then water the nearest, then the next nearest, for I heard the Messenger of Allah (peace and blessings of Allah be upon him) forbid the sale of surplus water (75)." Abu 'Ubayd (76) said: "The qild is the day of watering." In "al-Musnad" (77), [Hasan narrated to us] (78), he said: Hammad ibn Salamah narrated to us, from Abu al-Zubayr, from Jabir, who said: The Messenger of Allah (peace and blessings of Allah be upon him) forbade the sale of surplus water. And Iyas ibn 'Abd (79) narrated, saying: The Messenger of Allah (peace and blessings of Allah be upon him) forbade that the surplus of water be withheld. It was narrated by al-Tirmidhi (80), who said: "A hasan sahih hadith." In another wording: "He forbade the sale of water." And because there is, in withholding the surplus water, its destruction; therefore, withholding it was forbidden, just like livestock. As for their statement: "It possesses no sanctity," we say: Its owner possesses sanctity, so it is not permissible to be a cause for the destruction of his wealth. It is possible (81) that the negation of sanctity for it may be denied, for the squandering of wealth is prohibited, and destroying it is unlawful, and that is proof of its sanctity.

Section: If one buys a slave for a hundred, and someone else pays it on his behalf, it is valid, whether he paid it by his order or without his order.