Estimating the produce

Sayyidah Aishah al-Siddiqah (may Allah be pleased with her), while mentioning (the affair of) Khaybar, narrates: The Prophet (peace and blessings be upon him) sent Sayyiduna Ibn Rawahah (may Allah be pleased with him) to the Jews, and he would estimate the yield of their date palms; this was done when the dates became fit to eat, before (any of them) were eaten. Then they would give the Jews the choice: if they wished, they could take the produce according to that estimate, or else hand over that much produce to them. The Prophet (peace and blessings be upon him) ordered the yield to be estimated (in advance) so that the zakah could be counted before the fruit was picked and dispersed.
(Allamah al-Haythami says:) I say:
Abu Dawud recorded it in abridged form, mentioning zakah and other matters.
Ahmad recorded it, and al-Tabarani in al-Mu'jam al-Kabir. Ahmad's narrators are the narrators of the Sahih, except that in one narration he said: "from Ibn Jurayj, from Ibn Shihab", and in another narration he said: "Ibn Jurayj says: I was told this from Ibn Shihab."

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: The Prophet (peace and blessings be upon him) sent Sayyiduna Abdullah bin Rawahah (may Allah be pleased with him) to Khaybar to estimate their produce. Then he gave them the choice either to take (the produce) according to it, or to pay that amount. Those people said: "This is the truth by which the heavens and the earth stand."
Ahmad recorded it. Its chain contains al-Umari, and he has been criticised.

Abdullah bin Abi Bakr bin Muhammad bin Amr bin Hazm narrates: Sayyiduna Ibn Rawahah (may Allah be pleased with him) estimated the produce for the people of Khaybar for one year only; he was martyred in the Battle of Mu'tah. Then the Prophet (peace and blessings be upon him) sent Sayyiduna Jabbar bin Sakhr bin Khansa' (may Allah be pleased with him); this was after (the martyrdom of) Sayyiduna Ibn Rawahah (may Allah be pleased with him), and he estimated these people's produce.
Al-Tabarani recorded it in al-Mu'jam al-Kabir. This narration is mursal, and its chain is sahih (authentic).

Sayyiduna Rafi' bin Khadij (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) used to send Farwah bin Amr, who would estimate the yield of the date palms. When he entered a garden, he would count how many clusters were in it, then multiply them by one another (to find) what its yield would be; and he would not make a mistake in this.
Al-Tabarani recorded it in al-Mu'jam al-Kabir. Its chain contains Ishaq bin Abdullah bin Abi Farwah, and he is da'if (weak).

Sayyiduna Jabir (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) used to send a man from the Ansar, from Banu Bayadah, whose name was Farwah bin Amr, and he would estimate (the yield of) the dates of the people of Madinah.
Al-Tabarani recorded it in al-Mu'jam al-Kabir. Its chain contains Haram bin Uthman, and he is matruk (abandoned).

Sayyiduna Sahl bin Abi Hathmah (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) sent his father, Sayyiduna Abu Hathmah (may Allah be pleased with him), to estimate the yield of the dates. A man came to the Prophet (peace and blessings be upon him) and said: "O Messenger of Allah! Sayyiduna Abu Hathmah (may Allah be pleased with him) has fixed too much payment on us." The Prophet (peace and blessings be upon him) called Sayyiduna Abu Hathmah (may Allah be pleased with him) and said: "O Abu Hathmah! Your cousin says that you have fixed too much payment on him." He said: "O Messenger of Allah! I left a portion for his household, which he can feed to the needy, and I also left what the wind had knocked down." The Prophet (peace and blessings be upon him) said: "Your cousin has in fact given you more, and he has acted fairly."
Al-Tabarani recorded it in al-Mu'jam al-Awsat. Its chain contains Muhammad bin Sadaqah, and he is da'if (weak).