And 'Amr al-Naqid, Zuhayr ibn Harb, and Ibn Abi 'Umar narrated to me—Zuhayr said: Sufyan ibn 'Uyaynah narrated to us, from al-Zuhri, from Sa'id, from Abu Hurayrah, that the Prophet, peace and blessings be upon him, forbade that a townsman sell for a Bedouin, or that they engage in najash (collusive bidding), or that a man propose marriage over the proposal of his brother, or that he sell over the sale of his brother. And a woman should not ask for the divorce of her sister in order to turn over what is in her vessel or what is in her plate. 'Amr added in his narration: And a man should not bid over the bidding of his brother.